Tina discovers her father has age-related impairments, making it crucial to reunite him with his wife.

The top 5 artists perform a ballad and an up-tempo song in front of the coaches for their chance in the Live Finale. The night also features Sting-themed duets by the artists. Viewers have the chance to vote for their favorite artist overnight.

Poppa's severe back pain keeps him from seeing a doctor, until Ivy offers to stay the night to care for him. Meanwhile, Nina makes Junior think he lost his wedding ring.

NCIS investigates a murder related to a car that begins driving on its own. Also, Parker is still seeing visions of Lily.

After Hayley is deemed a "big child" by The Lady from The Hamster Rescue Society, she gets involved with two Roger personas who have a complicated family dynamic in an effort to prove that she is an adult woman.

The vampires go to an office party to celebrate Guillermo's promotion.

The case of a missing woman who disappeared after a night of clubbing with a Navy seaman takes the team to Mexico, where they learn of a possible connection to Gibbs' past.

Dr. Pierce treats a patient in crisis, presenting an ethical dilemma. Dr. Wolf and Dr. Nichols disagree on how to treat a patient.

Host Jon Stewart sits down with Ben Wikler, current Wisconsin Democratic Party Chair and candidate for DNC Chair.

Jimmy welcomes actress Keira Knightley, actor Christian Slater, and comedian Dean Edwards.

Stephen welcomes actor Billy Crystal and a musical performance by Arooj Aftab.

Millie reluctantly agrees to work with Holborn in the short term. Meanwhile, Hibiscus and Millie find a new balance in their relationship, and Curtis contemplates a change. Then, when Millie and Holborn make a breakthrough, Millie finds herself on a dangerous path.

Getting closer to Jentry prompts Michael and Kit to think about who they are - and who they really want to be. A new face stalks the halls at school.

With danger drawing closer, Sam takes refuge in the only safe place he knows. Reed issues an ultimatum, and Helen gets one step closer to the truth.

Claire finally loses herself in the hum as the outside world closes in on the group. One last group session ends in tragedy.