The gang reflect on their past entanglements, forgetting to safeguard a cherished item of Bonnie's in the process.

When Ben misses out on seeing Emma's first steps, the rest of the gang try to recreate the moment for him.

Ben and the guys try to come up with the perfect babysitting schedule.

The boys are getting fed up with Bonnie always being at their apartment.

Megan’s dog is stolen while under Ben’s care. Riley tries to get her old job back with Bonnie’s help.

Ladies man Ben has his life turned upside down when an ex leaves the daughter he never knew he had on his doorstep.

Ben's new boss assumes him and Riley are married, so he convinces her to go along with it.

Danny plays matchmaker for Riley and his new teammate, who secretly likes Bonnie. Elsewhere, Tucker gets back together with an ex-girlfriend who doesn’t get along with Ben, and she winds up making Ben’s work life miserable.

While looking for a new bar manager, Ben interviews his old crush Sam, and decides to get revenge on her for never noticing him in high school. But things don’t turn out as planned.

Riley goes a bit overboard when she becomes the captain of Ben's softball team.

Dr. Shaw determines Riley is the cause of Danny's inability to focus on the ice and bans her from Danny's next game. Meanwhile, Riley thinks things are moving too fast with Fitch and starts avoiding him, and gets her hopes up that Danny will make a move. Tucker is up for a promotion at work and his competition turns out to be Ben's latest fling, Jenna.

Ben discovers Tucker has been making extra cash by visiting a sperm bank. In order to help Tucker pick up a nurse at the bank, Ben agrees to donate his own sperm but quickly regrets his decision after a couple chooses his sample. Riley and Danny continue to fight while attempting to host their friend’s engagement party. Their moms, archenemies Bonnie and Jennifer, team up to get Riley and Danny back together.

Ben poses as Bonnie’s husband, Brad, when her friends from work don’t believe that she has an attractive, younger lover. When Danny begins dating a beautiful actress as a publicity stunt, Riley, who believes the relationship is real, decides to go back out with Ross to make Danny jealous. Tucker tries to further his entertainment reporting career by getting the real scoop on Danny and his new girlfriend.

Ben learns some interesting facts about Tucker’s recent date, so he enlists Danny’s help in finding out the truth. As Bonnie and Brad are preparing to set off on their trip around the world, Brad is arrested by the FBI.

Ben tries to get a date with a hot nurse treating Emma.

Ben tries to clean up his act by taking a Mommy and Me class.

Ben, Danny and Tucker band together to rescue Emma's missing stuffed animal. Meanwhile, Riley hosts a book club in an effort to make friends with the cool girls at work. When her mom, Jennifer, and Bonnie get wind of her plans, they invite themselves. Much to Riley's dismay, the ladies' long-standing rivalry erupts during the club meeting.

Riley plans to break up with Fitch, but then receives the news that Fitch is dead. She meets Fitch's dad, Winston Douglas, who asks her to deliver the eulogy at the funeral and tells Riley that Fitch planned to propose to her. Meanwhile, Ben realizes he might be in love with Megan, but she thinks things are moving way too fast. Tucker embarks on his "Tucket" list of things to do before he dies, and Bonnie schemes to catch the eye of Fitch's wealthy dad.

Emma’s mom, Angela, returns wanting to make amends with Ben and build a relationship with Emma.

Ben is still enthusiastically searching for the mysterious Elle. Danny and Riley are hunting for a good doctor to help with the pregnancy, and Bonnie desperately wants to be involved. Tucker is back from Los Angeles, but refuses to tell anyone what happened while he was there.

Tucker learns that the Mother’s Day special he produced was nominated for a New York Entertainment Award. Tucker’s mom surprises him by showing up to be his plus one to the ceremony, which throws a wrench in Tucker’s plans to have Bonnie pose as his mom. Riley is beginning to show in her pregnancy and worries if this will hold her back from being promoted to junior partner.

Sam comes back into the picture wanting to give her and Ben’s relationship another chance, but Ben hesitates on whether or not that’s a good idea as he’s still searching for the mysterious Elle. Little does he know, Bonnie is hired to be Elle’s new realtor. Danny and Tucker volunteer for a charity ice skating show featuring Emma’s favorite princess, while Riley practices parenting.

Ben and Tucker both try to hook up with the same woman.

Riley is excited to be maid of honor at a friends wedding but then Ben makes a mess of everything at the batchelorette party.

Ben begins to develop romantic feelings for Riley, but his reputation for being an irresponsible playboy works against him. Elsewhere, Tucker attempts to date a model and Bonnie uses Emma to get close to an attractive stranger.