Other mistake: When Don and Dr Smith are stealing Sesmar's control unit, look closely at the base of the electronic arch - Raddion is hidden from sight but the careful eye will see his golden feet.
Carmelita Is One of Us - S3-E25
Continuity mistake: In full shots of Kelly holding the baby, it is entirely covered by the pink blanket. But in close-ups, the blanket is pulled back to completely expose the baby's head. (00:17:00)
Continuity mistake: Ide can't sleep due to the thunderous snoring in the room. He grabs the blanket; the position of the blanket under his arms changes as the shot changes. (00:03:10)