S4, E2: The Hulk is an unwitting subject for scientific study in the conclusion of this two-part episode in which David Banner has been suspended in the body of the creature. Laurie Prange, Monte Markham, Carol Baxter, Whit Bissell and Arthur Rosenberg guest-star. After having been taken to a secret research facility for study by government scientists who believe he is an extraterrestrial being, the Hulk's tremendous power enables him to penetrate the sophisticated cell in which he is held. But, it takes more than brute strength to escape from the underground labyrinth in which he has been imprisoned.