Officers Chen and Bradford meet Ryan Seacrest when they respond to a call at the American Idol auditions in LA.

A witness agrees to testify against a gang member after a community activist is gunned down; TV host Bill O'Reilly criticises the police department.

Hank helps the victims from a car crash whose injuries are not immediately apparent. A childhood pal returns to the Hamptons after receiving a job offer, and Divya examines her relationship with her fiancé.

Tom and Marina must make a difficult choice after they uncover a bombshell revelation about Sofía Salazar; Connor and JoJo's secret relationship is complicated by Denise and Sarah's matchmaking efforts.

Things get a little hot in the kitchen when Tom considers ghostwriting a memoir for a celebrity chef; Connor starts dating a friend of Sarah and Denise's who makes a surprising impact on him.

Tyler uncovers a disturbing family mystery with Audrina Patridge, Moby is shocked when Tyler offers him very specific details from his mother and Austin Mahone receives answers about his deceased father.

Celebrity contestants include The Chainsmokers, 5 Seconds of Summer, Boris Kodjoe, Nicole Ari Parker, Roselyn Sanchez and Eric Winter.