Barry tries to convince the class to perform despite Cousineau's absence.

Axe has to step in when a tip from Dollar Bill goes south quickly. Chuck faces a threat to his new career aspirations. Wendy and Axe develop a plan to derail Taylor’s business. Taylor receives an important guest.

In search of Stewie's big wheel tricycle, Stewie and Brian embark on an adventure to a giant floating mass of trash out in the sea; Lois tries to help Quagmire elevate his dating game.

A NATO ally carries out a state-sponsored assassination attempt against one of its own citizens, who is also a U.S. resident and old friend of Elizabeth’s. Also, Alison starts dating the son of one of Elizabeth’s political rivals.

Department of Justice (DOJ) Agent Lance Hamilton asks Sam for assistance in locating a former U.S. border patrol tactical officer who disappeared following a threat by the cartel. Also, Kensi and Army Criminal Investigative Department (CID) Special Agent Steve Evans partner on a dangerous mission to recover a stolen hard drive with sensitive military intelligence on it.

Supergirl must deal with the destructive aftermath of Lex's nefarious plans. Shocked at what Lex has created, Supergirl faces her biggest challenge yet.

Homer works extra shifts at the plant so Lisa can play in the Capitol City Philharmonic.

In the aftermath of an overwhelming loss, the communities must brave a ferocious blizzard; as one group deals with an enemy from within, another is forced to make a life or death decision.