Ian and Caleb get serious. Lip appears before a disciplinary committee.
Alicia has trouble adjusting when she returns to work at Lockhart, Agos & Lee with Lucca. Their first case, involving a secret new computer tablet, causes a rift within the firm.
Lonely Professor Frink uses science to turn himself into a man whom women find attractive. Then, overwhelmed by the attention, he invents an algorithm to perfectly pair the lonely men and women of Springfield, realizing that scientific exploration is his true love. Meanwhile, Marge, Bart, and Lisa visit Grampa for Valentine's Day and try to rescue the old folks from a drug-induced hallucination that allows them to relive their happiest memories.
Peter overloads his phone with apps. He buys a new phone with more memory, gives his old phone to Chris, and hilarity ensues. Stewie joins a tennis club and invites Brian to be his tennis partner.
The tragic loss of Ellen's husband in the line of duty triggered hoarding through kleptomania. Her house in Queens, New York has become so unsafe with her lifted items, her home owners insurance is threatening to revoke coverage. Gloria's family is on the verge of calling the sheriff and the SPCA due to her out-of-control dog, cat, and stuff hoarding in Liberty, Texas.
Civilization returns to Nassau, and sets its sights on Vane. Flint, Silver and Billy encounter a new enemy. Rackham takes a stand against his crew. Scott finds his place in the new regime.
Dawn must run a tricky game of interference when each of the boys reveals they have started to look at Mae in a different light.
Tia is short-staffed, but finding a parolee who is prepared for the demands of the job is proving difficult. Then, when Tia hears about a pack of pit bulls running in the street, the team races to the rescue and find an overwhelmed owner.
In this last revisit, Adam and Jamie attempt to right their wrongs. First they bust out their drifting moves to find out whether drifting is faster than driving -- on dirt! Then they return to the ultimate fan favorite -- what is bulletproof -- and put lighters and fish tanks in the firing line. Finally, the guys test whether it's possible to survive two explosions by standing directly between them.
The history of the Vikings is explored by "Vikings" star Clive Standen, who joins experts in Europe to learn how the Vikings successfully invaded England and France.
When Hank raises the stakes of family game night to a new high, each member of the family will do whatever it takes to win the grand prize.
The GAC head to Lake Arrowhead, California, to investigate two buildings plagued with demonic activity.
The gang becomes inspired by the fact that it takes 10,000 hours to master something, so they decide to master their own things.
Horace's ex-wife Sarah comes to the bar to ask for Horace's advice.
A zombie house from the 90's becomes the team's latest project, but any hopes for a fast flip and a quick profit start to sour when they discover that the entire façade on the front of the house is filled with wood rot and needs to be replaced
The gang goes aboard the Air Gigantica and tries to stop a gremlin from sabotaging the flight. Meanwhile, after the pilot quits, Daphne has to try to land the plane safely before it crashes.
Cops use city cameras to track a suspected motorbike thief; a K-9 unit combs a dark hilltop; a concerned citizen steps in to thwart a pair of would-be mail burglars.
Shelby receives a pillow from an unknown sender. When she uses it to take a nap, she starts living a nightmare. The Rangers suspect this must be from Snide so they all make sure to stay awake, but that proves to be harder than they thought.