The turtles find out where the Ooze, the substance which made them mutate, came from. Unfortunately Shredder learns about it too, and uses it to enhance himself. So the turtles have to prove again who's the better ninja fighter.

Bad Grandpa .5 gives you a whole new perspective on the world of Irving Zisman with new scenes and pranks also featuring Spike Jonze as "Gloria" and Catherine Keener as Irving's wife "Ellie", plus a look at the evolution of Johnny Knoxville's naughty alter-ego, the makeup effects, and a behind-the-scenes peek at the idiocy it takes to make a hidden camera movie in public.

With Stan in drag, the boys get jobs as a butler and maid for a dinner party at the Vandevere's. After that ends in disaster, they're reduced to sweeping streets, and accidentally capture a bank robber. The grateful bank president sends them to Oxford for a proper education. There they become victims of student pranks, getting lost in the Maze and taking over the Dean's quarters as their own. But then a knock on the head gets Stan to believing he's the famed Lord Paddington, scholar and athlete extraordinaire. Suddenly erudite and supercilious, he retains Oliver as his valet, "Fatty."

A young newspaper reporter becomes a horrible crusty-faced zombie following a radioactive contamination.

Convinced romance is dead, a heart-broken-ed man turns to his best-friend who plans an unorthodox 'Mantervention'.