Shhh! Don't tell anyone, but: Matt and Mary both have mysterious new friends; Simon and his new charge, Happy, could be in the doghouse; and Lucy keeps mum about the object of a crush.

Mary offers to shield Lucy and her "date" from Eric; Matt gets into a scrape while out with a young woman; and Annie goes to Arizona to bring her parents home.

Eric helps out a woman who is being abused by her husband. But when the good reverend is seen escorting the woman to a motel one afternoon, it's the talk of the town. Meanwhile, Matt warns Mary about an older guy she's seeing.

A tug-of-war ensues between Eric and his cantankerous parents over who will adopt a young orphan found hiding in the church.

Mary takes a walk on the wild side with a classmate she meets in detention; a former associate minister from Eric's church drops in unexpectedly; Simon and Ruthie ferret out a scheme to fund their college educations.

In the third season-opener, Annie is feeling a little depressed since she's 3 months pregnant. Ruthie is pretending to feel a little pregnant herself. Lucy is following the dating advices from 'The Rules' book she has. Matt moves in an apartment with three attractive girls. Eric is looking for the perfect 20th anniversary plan for Annie. Mary gets a lot of attention from guys, which makes Lucy jealous. Although, one of Mary's 'guy' friends asks Lucy out. Matt finally comes back home because of girl problems he was having with his new roommates. Simon's girlfriend is acting a little weird. Eric and Annie tell the kids they're having TWINS!

Eric's old Rock & Roll band has come to town for a small concert, although he is suspicious about their possible drug habit. The band is staying at the Camden home--- they have parked their trailer on the front lawn. Meanwhile, Simon starts to drink coffee and becomes very addicted. Lucy continues to be on the phone constantly talking to her boyfriend Jordan while Ruthie is constantly chewing gum. Also, Mary finds out that one of her friends from the basketball team, Diane, is taking natural pills to boost her energy and that everyone else on the team is taking them. Mary then decides to take a few pills herself when overhearing Matt in a conversation about his bottle of natural pills. Eric then yells at Matt when finding pills in his room. Matt says that he got it from a friend, but he didn't take any yet. Mary then tells her father that she got the same pills from her friend Diane. When Eric tries to talk to Diane and her father, they do not listen to him. Later that evening, while E

During a difficult labor, Annie asks Dr. Hastings for help. Lucy decides to break up with Jordan because she doesn't feel the same love for him as he feels for her. Simon continues to pray for twin boys. Happy is alone in the house causing some mess and trouble. Simon suddenly decides that he would ask his parent's if he could get his ear pierced. Matt is reluctant and scared about giving blood and also tries to calm everybody's tensions with the arrival of the babies. Lastly, Ruthie is the same as usual in this heart-warming episode; bad-mouthing the twins until they come.

Eric counsels a troubled couple on the brink of divorce, Ted and Emily. Matt decides to join the Army without consulting his parents about it. Also, Mary and Lucy are desperate to get out of the house and later get into a car accident with Ted who was driving drunk when going out to get some more beer for his new apartment. Matt can't join the Army because he's not fully measured for the job. Also, Simon tries to find his red-lightning ring to get out of his bad luck as being the new middle child of the family now. He will even try chain letters to get out of it. Lastly, Ruthie tries her best to get peoples attention when their focuses are on the new babies.

Still unemployed and bills mounting, Mary continues her downward spiral to rock bottom as Eric and Annie fight about how to effectively deal with her numerous lies and immature behavior. Meanwhile, the fear of what may happen to Mary starts to take toll on the rest of the whole family. By this, it is prompting the children to break open the twins piggy banks to help Mary pay her bills. To get the credit card company to stop calling, however, they are forced to make a risky decision. During all this, Mary CONTINUES to ignore her responsibilities.

St. Valentine's Day delivers a few surprises for the Camden family. A grounded Simon is asked out by a senior. Annie's attempt to surprise Eric with romantic Valentine's plans backfires and results in a big fight. Mary discovers Robbie's plans with Joy. Lucy and Mary learn that Jeremy and Wilson both have dates for Valentine's. Matt seeks his fathers help as he wants to settle down, which leads him to seek out old girlfriends as to why they're no longer together. Ruthie is hesitant to go to a party because her friend tricked her into asking out a boy she's already going out with.

Matt is determined to settle down before heading off to medical school. While in search of a woman to marry, he goes out on a date Sarah, who is the daughter of a rabbi. Ruthie tries to set her brother straight by telling him not to do anything stupid. Eventually concern grows to fear for both families as both Matt and Sarah do not come home after their second date together in less than 24 hours.

The Camdens, especially Lucy and Ruthie, grow concerned that an unusually joyful Annie isn't dealing with her true emotions following the death of her father Charles, but the happiness proves to be infectious as it soon spreads through the family and all over town. Meanwhile, Eric tries to convince an unhappy Chandler that he should consider adoption. At the same time Chandler is approached by a mysterious young girl who gives him a cryptic message before she disappears.

Prospective homeowners Lucy and Kevin are ready for a fight to the finish when they learn that Chandler and his soon-to-be-adopted son Jeffrey are their rivals in a bidding war on a house. However, the conflict sparks an idea with Eric and Annie who decide to use their savings to buy their house from the church. Meanwhile, Ruthie is upset with Martin because she thinks he will get the garage apartment instead of her when Lucy and Kevin move out, and Peter suspects that his dad might be having an affair.

Lucy and Kevin celebrate their one-year wedding anniversary and contemplate whether they're ready to start a family, but things don't go off smoothly as Lucy refuses to drink champagne with Kevin during their anniversary dinner. Cecilia and Martin realize that their relationship may face a rocky future if Cecilia goes away to college. Chandler's foster son asks him to rid their house of all alcoholic beverages. Peter lies to Ruthie about his plans for the evening when she asks him to help her baby-sit the twins. With that, Peter goes missing, but concern turns to disappointment when Eric and Vic find him drinking alcohol with his friends at the park.

Lucy finds her husband Kevin and his partner Roxanne in a compromising position while on an undercover police assignment, Cecilia and Martin's relationship hits another bump in the road when their after-school commitments get in the way of one-on-one time, and Chandler may have bitten off more than he can chew as a new parent. Ruthie and Peter get stranded after missing their bus during a school field trip. However, fate intervenes when the youngsters cross paths with Lost Boys Nicodemus and Jacob, who not only take care of them until Reverend Camden arrives, but also share the heartbreaking story of their struggle to stay alive.

It's Camden chaos all around when Matt, who is having problems in his marriage to Sarah, returns to Glenoak for a visit and runs into his ex-girlfriend Heather on his flight to Glenoak. Simon unexpectedly announces he's coming home for the summer. Also, Lucy sets out to discover why Roxanne is suddenly too busy to hang out with her as she's convinced that Roxanne is secretly trying to become a detective behind Kevin's back. Ruthie keeps a secret about a fellow student from her parents. Lastly, Martin learns that his baseball teammates think he's having sex with Cecilia.

The Camden chaos continues with Matt, who is trying to salvage his marriage, questioning whether he still has feelings for his ex-girlfriend Heather; Simon's return to Glenoak creates conflicted feelings for his ex-girlfriend Cecilia, who is torn between her feelings for Simon and her current boyfriend Martin; Ruthie's foreign exchange student friend Maria, appears to be making the moves on Ruthie's boyfriend Peter; and grandparents-to-be Eric and Annie hop a plane for New York, despite Mary's repeated pleas for her family to stay away.

In last season's finale, Simon returned home from college and realized he still had feelings for Cecilia; Matt's marriage was tested when old feelings for his ex-girlfriend (guest-star Andrea Ferrell) resurfaced; and Eric and Annie became grandparents when Mary gave birth to her first child. In the ninth season premiere, Simon appears to be getting extremely close to his new girlfriend, Georgia (guest-star Rheagan Wallace), causing Eric and Annie to suspect they are having sex. Meanwhile, Kevin worries that mother-to-be Lucy may be in denial about her pregnancy when she refuses to go shopping for maternity clothes. Also, Matt returns home for a visit and is instantly pulled into the family drama. Lastly, Ruthie and the twins find themselves in a heap of trouble on their first day of high school and kindergarten, respectively.

Simon is reluctant to talk to Eric and Annie about his relationship with Georgia (guest star Rheagan Wallace). However, he eventually drops the bomb that they are having sex and that he's currently on academic probation for skipping classes to be with her. Meanwhile, Simon's situation helps Eric realize that the church should teach teens the importance of abstinence and he asks Lucy to lead a class on the subject. Also, Lucy and Kevin learn the sex of their baby, and Lucy starts to question her ability to be a good mother. Matt is worried that Martin is still broken-hearted over Cecilia and will tell her about Simon's new relationship with Georgia. Lastly, Matt chips away at Ruthie's unwillingness to apologize to Martin.

Although she is worried about the lesson plan for the class she is teaching on abstinence, Lucy is excited when Eric tells her she is now the Associate Pastor and will soon give her first sermon. Meanwhile, during Simon's visits with Dr. Gibson (guest-star David Piel), he confesses that he has been using his relationship with Georgia (guest-star Rheagan Wallace) to block out the guilt he still feels about the fatal traffic accident. Lastly, Ruthie falls for a guy she meets in detention, Harry (guest-star Aaron Carter), a foster kid currently living in a county facility, despite Martin's reservations.

Eric is approached by a young pregnant girl, Leanne (guest-star Amanda Fuller), for help in finding a family to adopt her baby. However, when Leanne goes into labor, she has a change of heart and suddenly Eric and Annie are stuck with the task of trying to convince Leanne's mother to support her and help find the baby's father. Meanwhile, Simon runs into the brother of the young boy he accidentally killed in the car accident, only to find that the brother has forgiven Simon and would like to help him find closure. Also, Harry (guest-star Aaron Carter) is confronted by Kevin and Martin for wanting to break up with Ruthie, and all three are surprised to learn that Ruthie wants the exact same thing; and Lucy teaches her first sex education class and finds she may be better at it than she expected.

As election day approcahes, Ruthie is on a mission to develop her own opinions about politics after seeing how much Martin knows about world politics. Meanwhile, both Eric and Annie are suspicious that the other did not vote in the last election. Also, Lucy is feeling the pressure of registering to vote and is surprised to learn that Kevin hasn't changed his address and therefore isn't registered either. Eric is having a hard time teaching the twins that politics are not stupid. Lastly, the family gets a nice call from Carlos and baby Charles.

Eric seeks help from Mary's (Jessica Biel, who does not appear in the episode) ex-boyfriend, Wilson (guest-star Andrew Keegan) after Charlie (guest-star Eric Panler), a new father, confesses to Eric that he has made a mistake and can't handle the responsibility of being a young dad. Meanwhile, Lucy and Kevin argue over which doctor they prefer, and Ben (guest-star Geoff Stults), who has taken an unusual interest in their pregnancy, only makes matters worse by siding with Lucy; and Ruthie has hidden intentions for wanting to hang out with Martin and his best friend Mac (guest-star Kyle Searles), which only leads to disappointment since Mac thinks of her more as a little sister.

When Kevin leads Venus (guest-star Martha Plimpton), a young woman, to believe that Martin is a rookie cop, she quickly expresses interest in him. Martin's friend Mac (guest-star Kyle Searles) encourages him to pursue Venus. Martin has a hard time revealing the truth after he learns that Venus' father is serving in the Middle East. Meanwhile, Eric and Annie are worried that Martin is getting in over his head with Venus and enlist Kevin to fix things, which only leads to rumors around the police station that Kevin is cheating on Lucy. Mac also jumps in by spreading rumors about Martin at school. Lastly, Ben (guest-star Geoff Stults) continues to hide his relationship with Lucy's new baby doctor, even though they spend a weekend together.