This is basically the second pilot. The first episode was called Solo. It was this episode shot in color with one change; Solo's was a Mr. Allison. They remade the series when the actor Mr. Allison (Mr. Kullova I think) was replaced by Mr. Waverly. The first pilot Solo was a shortened version of a film called To Trap a Spy. In both the film and Solo the enemy UNCLE went up against was WASP and changed to THRUSH. WASP was changed quickly for it sounded too close to White AngloSaxon Protestant.