When the sister of FBI Behavioral Analysis Unit (BAU) profiler Sydney Ortiz is the victim of an attempted kidnapping and sexual assault, Sydney seeks help from Isobel and the team in tracking down a meticulous serial offender who leaves no evidence behind.

Alex is torn between her daughter's school play and an "all-hands" situation in the Emergency Department; Joyce spends the hospital's limited funds on a fancy mammography machine; Matt's first day as a nurse isn't going as he'd hoped.

After 21 Emmys, 51 pros, 394 Stars, 32 winners and thousands of iconic performances, "Dancing with the Stars" celebrates the milestone 500th episode for a night full of dazzling moves and star-studded moments.

Sting and Jennifer Hudson serve as Mega Mentors to help prepare the artists for the Knockouts. In the Knockouts, the coaches pair three artists to perform solo against each other, then select a winner to move on. Each coach has one steal and a save.

Joyce's belief that personal life should stay out of the workplace is tested by unexpected news; Ron thinks a patient has a crush on him; Bruce tries to demonstrate the value of his important work.

After last year's devastating flood in the garden shaft, Rick, Marty and the fellowship return to Oak Island with renewed confidence and immediately discover a never before known shaft, which may finally lead them directly to the Money Pit.

The deputy inspector general calls on Tate, who is fluent in Spanish, to take on her first undercover field mission, joining Wes and the team in Spain as they investigate a seemingly dirty U.S. Drug Enforcement Administration special agent working out of Madrid.

A wrestling coach goes on trial after pushing his star athlete too far.

A murderer is on the loose and is headed towards Gibsons. In a race for time, the suspect's psychiatrist notifies Alberg of the potential threat after receiving a haunting text message. Alberg launches an investigation that takes an unexpected turn.

After Mark and Digger sell a $20,000 barrel of whiskey, they realize someone has been siphoning their liquor for years. Mark Rogers plots backwoods justice after finding Mike on his turf. Josh lands a lucrative deal, but Tickle and Henry have other ideas.

As Barnes adjusts to living without her children full time, she and Remy butt heads when she disregards his direct orders and investigates a scam call center from where she received a distressing call from a young girl.

Simon's mother asks Alec to help stop a suicide contagion when a third student death strikes the campus. Alex asks Marisa to help when he thinks there might be more to the case. Phoebe struggles with her next career move.

New lawyers and a second trial offer unexpected hope, but Aaron's tortured mind struggles to withstand the weight of his deepest secrets.

Morgan agrees to show Ava around the LAPD, but things quickly take a dangerous turn when the precinct is held hostage by the friends of a recently convicted man. Can Morgan and the detectives outsmart their captors and lead everyone to safety?

Host Jordan Klepper talks with Robert Putnam, a Harvard professor and social scientist, about his documentary "Join or Die".

Jimmy welcomes actor Jeff Goldblum, actor Luke Grimes, and actress Lacey Chabert.

Stephen welcomes PEOPLE's "Sexiest Man Alive" and film director Francis Ford Coppola.

2000: As things come to a head, Honey and Bunny join forces to unleash their full might, fighting for love, family, and their daughter's future. As KD decides to take matters into his own hands, the ensuing battle tests their resilience, leaving the future uncertain.

The siege reaches a tense climax. As the government releases an official version of events, Maider fights to uncover the full truth, no matter the cost.

Hae Jo spends meaningful time with Ko Jae-geun up in the mountains. Back in Seoul, Chil-seong corners Kkari and forces him to track down his old partner.

Desperate to avenge Boss, Taylor heads to Mexico to train but struggles to get back into the cage - until a fighting legend steps in to help.

The hunt is on for Ian Bett as a picture of Anton Bergen begins to emerge. Are Calder and Tosh dealing with the revenge of a jealous ex-husband?

Comedy music quiz hosted by Greg Davies, with Bradley Simpson, Duncan James and Sam Campbell joining regulars Noel Fielding and Jamali Maddix and guest captain Perrie Edwards,