1) Cushman reads a source saying pick-up scene for "The Naked Time" was filmed during "The Man Trap".
2) Cushman sees Budd Albright in "The Man Trap", thinks it's Bruce Hyde and concludes this was the scene in question.
This is probably what happened. Take a look at this shot
in 'The Naked Time' and this shot
in 'The Man Trap.'
I'd have to check the archival records to be sure, but it's not hard to believe that NBC wanted a short expository scene with the bridge dropped in at the beginning of 'The Man Trap' when it was decided to broadcast it first.
Lazy fucking work on Cushman's part, though. And, unless someone said, I'll repeat my question -- does he double down on this claim in the revised and expanded edition?