Lost in Space are to be cryogenically frozen for the voyage, and they are set to be unfrozen when the spacecraft approaches its destination. Meanwhile, Dr. Zachary Smith (Jonathan Harris), Alpha Control's doctor, is revealed to be a saboteur on behalf of an unnamed nation. After disposing of a guard who catches him on board the spacecraft, Smith reprograms the "Jupiter 2"s B-9 environmental control robot (voiced by Dick Tufeld) to destroy critical systems on the spaceship eight hours after launch. Smith, however, becomes trapped aboard at launch and his extra weight throws the "Jupiter 2" off course, causing it to encounter a
Lost in Space (American Dad!) to the Limit, One More Time". In "Lost in Space," Jeff endeavors to prove to slave-owning aliens the legitimacy of his love for wife Hayley Smith in order to escape the spaceship. "Lost in Space" is unconventional in that Jeff is, for the most part, the only main character from the show to appear, although Roger and Hayley have brief cameo appearances, and the rest of the family makes a brief appearance together in the beginning recap. The episode received positive reviews from television critics, with praise directed to the visual style and humor. Jeff is unconscious, hanging from a