Nate from You Look Different in Real Life has the Grease soundtrack on his phone. When Justine expresses surprise, he says, "I'm a T-Bird at heart", and reminisces about Felix getting him into the movie.
In The Mermaid's Mirror, Kai auditions for the role of Danny in his school's production of Grease. He tries to talk Lena into auditioning for Sandy. He gets cast as Kenickie instead.
The Big Bang Theory: In the episode "The Rothman Disintegration," Penny, Amy and Bernadette watch Grease. Amy had never seen the film before due to it being forbidden by her overprotective mother.
Penny: I cannot believe you've never seen Grease. Amy: My mother didn't allow me to watch it. She was afraid it might encourage me to join a gang.
Glee had a plotline involving a production of Grease at McKinley High. The previous season also featured a Shot-for-Shot Remake of "Summer Nights" as featured in the movie.
The Goodies episode "Saturday Night Grease" not only references it in the title, but has a parody of "Greased Lightnin'" called "Greased Cyclin'", and a cover of "You're the One That I Want" performed by Graeme Garden, who's dressed like Sandy at the end of the movie.
Horrible Histories: The "Pioneers of Transportation" song is a pastiche of "Greased Lightning".
The second season premiere is an episode based on Danny and Sandy's story, with Cindy being named after Sandy herself and the characters singing a parody of "Summer Nights."
Norberto and Raquel from "Son Pololos" are modeled after John Travolta and Olivia Newton-John's portrayal of Danny and Sandy.
ThisCollegeHumor sketch features the Burger Palace Boys reacting appropriately to the rather unfortunate implications of Kenickie's line "did she put up a fight", with the reveal that Kenickie is a rapist, causing the other boys to beat him up in anger.
Bob's Burgers: In "Something Old, Something New, Something Bob Caters For You", the Belcher kids make a bet over who gets to be in the most photos during a wedding Bob is catering, and the loser has to clean the grease trap at the restaurant. Gene tells Tina and Louise, "Better call yourselves Sandy and Rizzo, 'cause you're about to be in grease!"
In the Family Guy episode "Let's Go to the Hop", "Give Up the Toad" is a parody of "You're the One That I Want".
In "And I'm Joyce Kinney", a cutaway gag shows the original ending where Danny and Sandy are trapped in the sky with no way to get down.
A sketch from "Slaughterhouse on the Prairie" involves the greasers fixing up the "Greased Lightnin'" car which turns into the Humping Robot.
A sketch from "Hermie Nursery in: Seafood Sensation" involves Offred and Commander Waterford from The Handmaid's Tale starring in a musical parody of "Summer Nights".
parodies the song "Summer Nights". In it, the man believes the second line of the song to be a reference to how long he lasts in bed.