Complex sentence: Marty, as a supernatural being, would frequently break the fourth wall; for instance, prior to the opening credits of the episode "Grumpy Young Men", Marty explained the absence of Steve's mother and the return of his father to the viewers.
Split into simpler sentences: Marty, as a supernatural being, would frequently break the fourth wall. One example being prior to the opening credits of the episode "Grumpy Young Men", Marty explained the absence of Steve's mother and the return of his father to the viewers.