Star Trek: The Original Series, Duotronic Circuit Jumpers

replica movie prop

Alphanumerically and color-coded solid geometric blocks, used to effect temporary bypasses and repairs to shipboard systems.  In first season episode The Naked Time, Scotty uses a set of these devices to regain partial helm control, which had been locked out from Engineering by the deranged 'Captain' Kevin Thomas Riley. Seen again in use by Mr. Spock in Balance of Terror, and as a background prop in multiple episodes including Devil in the Dark, Operation: Annihilate, The Doomsday Machine, The Omega Glory, The Apple, and The Changeling.

Solid resin replicas, accurate to the screenused props, including magnetized bases allowing direct attachment to metallic surfaces. Last picture shows these blocks included in a set of TOS prop replicas dubbed the 'duotronic repair station'.

By gaston.