This episode features the debut of two new devices that will be used by the castaways for the remainder of the series; a periscope as well as a laser torch.
The robot's behavior might stem from a severe identity crisis. In the title, it's called The Mechanical Man; its creator calls him The Hydraulic Man; and in the closing credits, it's called Super Giant Robot.
This is the first episode of the second season. It features a new opening title sequence and the same theme music from the first season. New theme music will be incorporated in future episodes.
Production code number 4703. Although this was the first aired episode of the second season, it was the third in production order.
Mark, Valerie and Betty all have new wardrobes beginning with this episode.