The Sarah Jane Adventures/Recap/S1/E01 E2 Revenge of the Slitheen

Luke and Maria start their first day at their new school, but not everything is as it seems, the cafeteria food is mouldy, the air smells like batteries, people are spontaneously getting ill and worst of all, the portly head teacher has gas problems. Aided by their new friend, Clyde Langer, Sarah Jane and the gang discover a sinister revenge plot engineered by the Slitheen, for what the Doctor did to another branch of their family.

Tropes

 * Adventure Rebuff: Both Sarah Jane and Maria try to make Clyde go away for his own good. It doesn't work.
 * Bland-Name Product: Clyde's Wolverine brand body spray, a play on the real brand "Lynx".
 * Continuity Nod: Slitheen in Downing Street.
 * Evil Teacher: The Slitheen pose as teachers  during their revenge plot.
 * Fat Bastard: The Slitheen, as usual.
 * Fridge Horror:
 * Hold Your Hippogriffs: "Oh, for the love of Clom!"
 * Incest Subtext: Between Glune, the headmaster Slitheen, and Kist, the science teacher Slitheen, which might help explain why the Slitheen are so screwed up.
 * Large Ham: All of the Slitheen.
 * Nice Job Breaking It, Hero: Luke gives the Slitheen the equations they need in response to a transparent ploy that you'd have to have been born yesterday not to see thr- oh.
 * Nightmare Fuel: The Slitheen,
 * Second Episode Introduction: Clyde.
 * School for Scheming:
 * Shout Out: "Let's have a High School Musical moment. A group hug will sort everything out."
 * The Night That Never Ends: A variation,
 * Toilet Humor: Luke doesn't understand it.
 * Even Evil Has Loved Ones: