Experiment 210: RETRO Nani meets some of her friends from high school and tries to impress them by saying she is vice president and they convince her to introduce them to her family. The day only gets worse when experiment 210, tries to revert everyone back to a prehistoric state...
There is a Battle of the Bands competition being held at the Tipton Hotel. Zack and Cody, along with Max and Tapeworm compete against Maddie's band in which has London in the band.
Numbuh 1, both literally and figuratively, risks his neck when he sides with an adult to rid children of snake-like ties.
Bloo is challenged to a fight at the end of the day, but he would rather avoid it.
Paige was last seen sneaking out of her office at the same time as an NYPD detective was asking her boss to direct him to Paige for a routine inquiry. To the team's surprise, the NYPD detective turns out to have been an imposter, causing them to question why Paige chose to run from this mystery man, what he wanted -- and if he caught up with her. Further investigation uncovers that the seemingly upstanding and socially conscious Paige was involved in a lucrative identity theft ring with close ties to a terrorist on a watch list who was recently seen in New York with her. Meanwhile, the remaining team members are gravely concerned about Vivian, who is undergoing open-heart surgery on that very day.
While investigating a case, Nick is abducted and is buried alive in a special coffin while his team takes unorthodox steps to try to find him.
With its desperate attempt to ransom Nick's release failed by their enemy's fanatical revenge, the CSI team must use all their investigative talents to find Nick, whose perilous situation is becoming all the more horrific by the minute.
Casualties of a disaster flood the ER, which is short-handed because everyone is at Dr. Carter's going-away party because he's leaving the ER after 11 years. Dr. Pratt looks for the courage to confront his father, Charlie.
Ash struggles against an opponent whose strategy is a marked contrast to his straightforward style and tries to throw her off with Corphish, one of his spunkiest Pokémon.
In season three's live finale, Donald Trump chooses his next Apprentice.
Having quit his job at the law firm, Will turns to a career in writing where he catches the eye of Malcolm, who claims to have high-profile connections -- but when his writing career fails, Malcolm has another job offer for Will. Meanwhile, Tom, an old flame from college, returns to ask Grace to design a hotel that he and his wife just bought -- only to discover that there are still romantic feelings between the two of them. Jack struggles to produce his latest show for OutTV, but spoiled child star Randall fails to embody Jack's vision. Under threat of a lawsuit, Karen is forced to publicly apologize to Beverly for an embarrassing rumor.
After his first day, Will becomes suspicious of his new job -- especially when he finds himself in an empty office with no co-workers, a German shepherd and a Russian-speaking thug.
Kirsten hits rock bottom after Caleb's funeral, prompting Sandy to finally take action; Jimmy Cooper resurfaces and almost immediately renews ties with a mourning Julie; Jess bullies Trey into participating in a drug deal that turns into a shootout; Ryan finally learns the truth about what happened between Trey and Marissa, leading to a bloody confrontation.
Hugh Abbot is the Minister for Social Affairs and he's facing a policy crisis; his 'Snooper Squad' idea has been vetoed which leaves him with just forty minutes to come up with a new policy.
Unable to find employment after giving up his job at Radford, Greg is forced to swallow his pride and take a position outside of the movie world. But when he finds out his house is covered in toxic mold and unfit to live in, he's unable to swallow it a second time.
The French woman-Danielle Rousseau-shocks the survivors by showing up to the camp with a dire warning about "the Others" who are on the island, and the black smoke that precedes them. Meanwhile, Michael and Jin ready the raft for sailing. In flashbacks, we see the survivors final moments before they boarded their fateful flight.
After a nightmare, Clark goes to the cave to confront his father Jor-El. Jor-El warns that the crystals have fallen into human hands and have triggered a new meteor shower which will annihilate the Earth unless he reunites the three crystals. Meanwhile, Lex helps Lana, who has apparently commited murder, but then turns against her to get possession of her Kryptonian stone. As disaster looms, Chloe and Lois try to find Lana while Clark attempts to reassemble the stones, and Jason returns to make things unpleasant for the Kents.
Dr. Tenma takes Verderman hostage in a desperate search for Eva. And Verderman's dark past is revealed.
After a tactical group infiltrates the DSR and steals Rambaldi artifacts, CIA director Hayden Chase discovers that the alarms at the DSR were disabled from Nadia's computer, allowing the raid to happen, and shows up at the apartment to question her. Soon Sloane and Jack arrive and suspect that Sophia, who had access to the computer while she was living with Syd and Nadia, is Elena Derevko. They follow her trail to a dead Rambaldi follower, a stunning betrayal, and a presumed dead family member...
Rambaldi's catastrophic endgame begins to fall into place as a giant version of the Circumference/Mueller device is found floating over city in Russia, driving the citizens made. After a wounded Dixon reveals that Irina is alive, Sydney, Nadia, and Jack set off to find her. Irina had been captured, and then duplicated using Project Helix, in order to give the impression that she was dead. Sydney and Nadia discover Irina is being held inside a camp in Tikal, safely in the clutches of Elena's army. Irina had apparently been working to counter Elena's organization, the Covenant, and actually PREVENT the Rambaldi endgame. Irina tells of a page she destroyed, a page that was key to Rambaldi's endgame. Under torture, she finally broke and recreated it for Elena. After a short respite, the transport turns towards Russia, and Sydney, Vaughn, Jack, Nadia, and Irina parachute down, towards Elena, Sloane, the Circumference....and destiny.