Benson and Stabler team up with Briscoe and Green when a young shooting victim tests positive for a sexually transmitted disease.

When villains from Earth-X launch an attack at Barry and Iris's wedding, the superheroes work together to save the world.

The detectives believe that someone is murdering hospital patients, and find that tainted medication is leading to the deaths.

Arthur Dale's brother recounts a tale about a talented alien baseball player who hid amongst an all-African-American team in Roswell, New Mexico, during the 1940s.

Ally and her new boyfriend are involved in a traffic accident, then must deal with a 10-year-old genius lawyer.

Ally reluctantly agrees to meet with the psychiatrist who helps Cage; Fish pursues Janet Reno once again.

Ally's friends plan a birthday surprise for her; a client believes his foot fetish qualifies him as temporarily insane.

In shock over an encounter with Billy, Ally concludes her life is in crisis and calls Dr Tracy Clark.

The lawyers are shocked when a new attorney joins the firm; John and Nelle represent a couple in a wrongful-termination suit.

Tired of her conservative appearance, Georgia enlists Ling's help; Ally tries to make Greg jealous by showing up at a party with a new date.

Ally counsels a terminally ill boy who wants to sue God; Cage and Fish defend a jilted husband accused of a crime of passion.

Ally is dismayed when Fish accepts a case involving a husband who petitions the court for an annulment after nine years of marriage.

A conscience-stricken Ally is thrown into turmoil by Dr Clark's revelations about Billy; Cage and Ling work on a case involving pornography.

Rumours about Ally and Billy's romantic encounter spread through the firm; Cage and Fish clash when John represents a woman in a fraud case.

Ally lobbies to get the court to allow her former teacher to be put in a coma; Nelle and Cage quarrel.

Derek and Karen must make a difficult decision; a complication arises in Jerry and Eileen's partnership; Ivy makes a final effort to save her and Terry's show, with unexpected results.

Tom's desire to prove himself may not be the best thing for the show; a mishap forces Ivy to make a decision; Karen becomes suspicious of Derek's intentions.

When Ivy's mother joins the cast of Bombshell, Tom must defuse the tension between them; Ana's new-found success and a surprise visitor threaten Karen and Jimmy's connection; information about Jimmy's past is revealed.

Tom ends up in an awkward situation when Ivy brings Sam back to town; Jimmy and Derek's visions clash; Karen and Ana try to stand up for what they want.

Ivy gets support from an unexpected place when she is overcome by nerves on opening night; Tom and Julia consider their next project; Eileen's problems with Richard come to a head; Jimmy talks to Karen about his past.