In the second of two sequels to Lost in Space: The Android Machine (1966), Verda's sheltered by the Robinsons after she's marked for destruction by the Celestial Department Store. To that end, the store dispatches a killer android: IDAK (Instant Destroyer And Killer).

While in the Valley of Shadows the Robot is affected by strange forces and grows to the size of a building. Will and Dr. Smith enter the Robot to try to reverse the process and save him.