The Best Episodes Directed By Dan Lerner

A northern California marijuana mastermind cannot testify without using the drug to neutralize his anxiety disorder.

Mary and Marshall find themselves in a difficult position when Stan's very first witness turns up dead and he is implicated in her murder.

Mary lends her expertise for the U.S. Marshalls by making a training video with a film crew. Elsewhere, Marshall prepares the arrangements so that an elderly mobster in Witsec can go to his son's funeral.

Mary’s new witness falls in love for the first time; Mary must stop her witness from taking out his pain in the form of an explosive device.

A witness with Aspergers who has no social filter and can't lie stymies Mary, particularly when the witness refuses to testify against her only friend – the key conspirator in a numbers case. Meanwhile, Marshall and Stan race to figure out why an Immigration and Customs Enforcement agent is holding up the visa of a key witness before she is deported. Plus, Brandi reveals her plan for the money she made by investing with Scott.

Mary uses a thief to catch a thief when she asks a witness to consult on a crime in order to exonerate Brandi of grand theft auto.

An Amish witness comes into the program and must learn to adapt.

Mary sees whether she can balance motherhood with a demanding profession and a dysfunctional home life, or if she will put her baby up for adoption.

When Marshall's witness escapes from the WITSEC offices and disappears on an Indian Reservation, Mary and Marshall will need the help of a Native American detective to track him down.

Mary is still reeling from the flood of emotions stirred-up after having to arrest her father, James, when he unexpectedly showed up on her doorstep after being AWOL for 30 years. Bad goes to worse when Special Agent Robert O'Connor, Mary's "favorite" FBI agent, demands her assistance to get James to provide critical information regarding his old partner-in-crime, Cormack “Sully” Sullivan, one of the FBI's 10 Most Wanted.

Series Finale: Drastic changes take place at the Albuquerque WITSEC office. Mary finds herself caught between a witness and an unexpected family reunion.

Lily tells Jake she wants a divorce, and tells Rick about her one-night stand with Jake. Rick can't forgive her, putting their future in jeopardy.

Mary suffers the consequences when an attractive witness, who she slept with, is accused of murder.

Bull travels to a small town on a personal mission to help his high school sweetheart sue a local factory that she believes is making residents ill by contaminating the water.

Bull and his on-again, off-again romantic rival, Diana Lindsay, join forces to create two separate but collaborative defense teams when Diana's niece and her husband are charged with armed robbery. As the trial gets underway, Bull's reunion with Diana is strained by his new post-heart attack regimen.

Lila voices her opposition to Samson's itinerary for the troupe. Justin's baptism of the faithful coincides with another tragedy and a startling event in the migrant camp. Libby pleads with Jones to reveal his secret. Sofie sees a familiar face.

Bull’s efforts to assist with his ex-wife Isabella Colón’s defense in a wrongful death lawsuit are hindered by unresolved issues from their marriage and her longstanding rift with her brother, Benny.

While responding to a call in the field, Dawson accidentally hits a pedestrian who stepped in front of the ambulance, and is left to deal with the repercussions. Lt. Casey and Lt. Severide disagree and continue to investigate an arson case while Chief Boden is left to decide whether to attend an important function in New York. Elsewhere, in hopes of preparing him for a possible promotion, Lt. Casey puts Herrmann at the helm for a shift so he can discover firsthand what his superiors deal with.

A serial killer from Liz's past strikes again while Red hunts for whoever betrayed him.

When a psychiatrist is gunned down, Tru tries to identify the killer… but Jacks meddling implicates her in the murder.

Huff is not happy when Melody returns in his sexual fantasies, and at the most inopportune times. Russell is coming out of his body cleansing and purification regime in time to take Laura, one of the partners in his law firm, out to dinner. Byrd is under tremendous peer pressure to steal drug samples from his father. Meanwhile, Beth has a verbal run-in with the cops in a convenience store. Russell lobbies Izzy to sign her divorce papers.

Huff is less than pleased with where Teddy choses as his assisted-living facility. Russell ends up asking Huff to give a professional opinion of his new client's behavior. Teddy has a moving moment with Byrd and Beth's mother's health dramatically changes.

The DA's office asks Bull to assist them in their prosecution of a fraternity when a pledge accidentally drowns during a hazing incident, but his efforts may be derailed when the students close ranks to stonewall him.

Bull’s new relationship with Diana, his on-again romantic rival, is complicated by his renewed feelings for his ex-wife, Isabella, when they’re reunited by the sudden death of her and Benny’s father. Also, a deceased tech billionaire’s brother comes to TAC for help in bringing suit against the doctor he holds personally responsible for the tycoon’s death.

TAC braces for an un-jolly Christmas when Bull and Benny represent Marissa and her estranged husband, Greg, in federal court after they're charged with money laundering and fraud connected to Greg's restaurant. As Bull and Benny defend the divorcing couple together so the prosecution can't use them against each other, they search for jurors who will believe Marissa had no knowledge of Greg's business dealings. Also, as Bull and Izzy prepare to baptize Astrid before the Christmas holiday, they reach an impasse regarding what they want from their renewed relationship.