This is from the 星, つ星 Trek : Deep 宇宙 Nine episode "7x15 : Badda-Bing, Badda-Bang", at the end where James Darren and Avery Brooks sing a little duet. Like most of Darren's songs, it's a Sinatra tune.
Extracts from special episode DS9 "30th Anniversary Salute to Original 星, つ星 Trek." ST DS9 5x06 TRIALS AND TRIBULATIONS:Sisko travels back in time to a pivotal moment in history of the original Starship Enterprise.Uploaded によって LeSPOCK on YouTube
