Stop me if you heard this one already, but in the late 1960's two superheroes were given there own TV Shows (Batman and Green Hornet). Then came the crossover of the decade in 1967 in an two episodes of Batman (A Piece of the Action and Batman's Satisfaction), where Green Hornet and Kato traced a flood of counterfeit stamps by someone named Col. Gumm, an evil foreman running a counterfeit rare-stamps operation. After they bust in on the operation, the owner of that factory thought that Green Hornet and Kato were crooks and phoned in Comissoner Gordon, who alerts the Dynamic Duo. From this two-part episode, the Dynamic Duo thought that the Green Hornet and Kato were crooks behind the scheme and the two duos fought each other after fighting the real crooks.