In the season finale episode, "Anthology of Interest I," Professor Farnsworth unveils his "What-if" machine and Bender, Leela, and Fry each get a chance to ask it a question. Bender asks what it would be like if he were 500 feet tall, so he becomes a giant and flies to Earth to the tune of Black Sabbath's "Iron Man." He befriends a boy (Fry) and accidentally destroys the city in a take on The Iron Giant. The Professor then makes Dr. Zoidberg a giant so they can fight each other. Leela asks what it would be like if she were more impulsive, so she ends up killing the Professor in order to get his fortune. As people find out about the murder, she is forced to kill them one by one until she has killed almost everyone. Fry asks what it would be like if he were never cryogenically frozen in 1999. He ends up meeting the Action Rangers -- made up of scientist Stephen Hawking, Vice President Al Gore, Star Trek actress Nichelle Nichols, and Dungeons and Dragons creator Gary Gygax.