TV Guide Nickelodeon Thursday

When Plankton is injured and forgets who he is, he's adopted by the Dartfish family. While he teaches the family his evil ways, his wife Karen searches across town for him. (S4, ep 4b)

SpongeBob and Patrick discover a familiar face in 'We Heart Hoops', then in 'SpongeChovy', it's invasion of the faux-chovies when everyone in Bikini Bottom suddenly starts meeping!

When Dave learns that Alvin blamed him for his poor grades to Miss Smith, Dave sets down a very strict study schedule

The heroes in a half shell come to terms with their new roles as saviours of New York City in an animated series set shortly after the events chronicled in the film Teenage Mutant Ninja Turtles: Mutant Mayhem. Donatello (voiced by Micah Abbey), Leonardo (Nicolas Cantu), Michelangelo (Shamon Brown Jr) and Raphael (Brady Noon) experience the usual growing pains of teenagers while contending with the media spotlight. Building on their friendship with aspiring reporter April O'Neil (Ayo Edebiri), the reptilian quartet face brilliant inventor Bishop (Alanna Ubach), who believes mutants are the greatest danger facing humankind and must be eliminated. Meanwhile, pampered rich kid Rod (Pete Davison) yearns to be a mutant and leverages his wealth and connections to achieve a dangerous dream

The Sharks are the toughest guys in town, but their next confrontation might be too much in 'Sharks vs. Pods', and then in 'CopyBob DittoPants', Plankton clones SpongeBob to steal the secret formula.

SpongeBob and Patrick think their homes have been sold, and move away, to Squidward's glee, in 'Sold!', and in 'Lame and Fortune', Plankton realises he can twist fortune cookies to suit his evil plot.

When Plankton is injured and forgets who he is, he's adopted by the Dartfish family. While he teaches the family his evil ways, his wife Karen searches across town for him. (S4, ep 4b)

Emily and Sunny find a sap that makes them act like their seven-year-old selves. Ellis tries to protect Emily from embarrassing herself, and the others seek an antidote. (S3, ep 18)