Uncle Fester, the Professor and Mr. Drysdale!!!

I love movies that pack in tv icons, but in roles different than what they are famous for. Jackie Coogan is an upsetting short wearing warmonger, but doesn't sleep on nails or light lightbulbs in his mouth. Russell Johnson is a child beating, deadbeat drunk, with nary a coconut based invention in sight (he even fails the application exam). Raymond Bailey is the brains of the operation, and the the scientist who figures everything out, but doesn't even try to get Jethro a job at the missile factory. There were a few more washed up tv actors sprinkled about, including one or more of the 'space children' who showed up on episodes of Star Trek.