This is from the Star Trek : Deep Space 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.

A Weyoun fan-vid. May the Founders locate your genetic template and bring you back to us as soon as possible.

Extracts from special episode DS9 "30th Anniversary Salute to Original Star Trek." ST DS9 5x06 TRIALS AND TRIBULATIONS:Sisko travels back in time to a pivotal moment in history of the original Starship Enterprise.Uploaded by LeSPOCK on youtube