Batdiamond, The - 10,000 carat diamond on the fantasy adventure BATMAN/ABC/1966-68. The Bat Diamond energized the Bat Computer located in the Bat Cave beneath stately Wayne Manor. Set inside a clear casing, the same shape as the diamond, the basketball-sized, man-made jewel (it took six months to process) rotated in circles providing energy and processing power to the many circuits in the Bat Computer. On episode No. 57/58 "Marsha, Queen of Diamonds"/"Marsha's Scheme With Diamonds" (aired 11/23&24/1966) Marsha, Queen of Diamonds (Carolyn Jones) attempted to locate the Bat Cave and steal the Bat Diamond for her own collection.