E-Den wouldd once again remain shut-up and abandoned until episode the time of Season 5, the episode of What Color is Your Cleansuit? Dr. Venture needed an enclosed space to develop Project Palaemon, for which E-Den had to be cleaned out. The Venture Family lured out the gorilla by covering Billy in meat. One the gorilla was lured out, Sergeant Hatred killed it. The discovery of two of its babies was an unwelcome and disheartening surprise.