The Lady and the Monster - Fantastic Four (S1:E6)

Basic Info
The Lady and the Monster is the sixth episode of Fantastic Four. It features the Puppet Master as the main antagonist. This episode is followed by the first part of the crossover between this show and Avengers: Assemble.

Synopsis
The Fantastic Four are thrown off-guard when they find themselves in a fight with each other. They soon realize that someone's controlling them, and that the person is planning something big.

Trivia

 * This episode comes directly after the mid-season break and directly before the first part of the crossover event.