Forbidden Planet box, using the original film poster for its wraparound cover. Both DVD and high definition HD DVD formats were available in this deluxe package. Inside both premium packages were the films "Forbidden Planet" and "The Invisible Boy", "The Thin Man" episode "Robot Client" ("Robby The Robot", one of the film's co-stars, was also a guest star in both "The Thin Man" episode and "The Invisible Boy") and a documentary "Watch the Skies!: Science Fiction, The 1950s and Us". Also included were miniature lobby cards and an 8 cm (3-inch) toy replica of Robby the Robot. This was quickly followed by
Planet of Evil but name, the Id monster from the 1956 MGM feature film "Forbidden Planet"." Howe and Walker also praised the jungle set and the performances of Frederick Jaeger and Ewen Solon, but criticised Prentis Hancock's "poor" portrayal of Salamar. Ray Dexter's assessment of "Planet of Evil" also acknowledged the influence of the 1956 film "Forbidden Planet", which inspired the writers to include an invisible, murderous monster, as well as elements of "Jekyll and Hyde". Reviewing the serial in 1999, literary critic John Kenneth Muir drew attention to similarities between "Planet of Evil" and Ridley Scott's 1979 film, "Alien", in particular the