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'.