Buck Rogers in the 25th Century S02 E12 Testimony of a Traitor

"The original space man! The ultimate trip! Buck Rogers swings back to earth and lays it on the 25th Century!"

An ancient videotape is discovered that proves that Buck was involved in the nuclear holocaust that nearly destroyed the Earth hundreds of years before. Commissioner Bergstrom convenes a war crimes trial aboard the Searcher and, if Buck is found guilty, faces a death sentence. In a desperate attempt to clear himself, Buck agrees to another mind probe, but his memories seem to confirm the charges.