This is from the stella, star Trek : Deep spazio Nine episode "7x15 : Badda-Bing, Badda-Bang", at the end where James Darren and Avery Brooks sing a little duet

This is a clip from the first episode "The Emissary", where two legends meet: Captain Jean-Luc Picard, commanding officer of the USS Enterprise-D, and Commander Benjamin Sisko, recently assigned to the command of DS9

The Best Moment in stella, star Trek Deep spazio Nine, which explains how the Romulans joined the Dominion war. I warn you, this is about as far away from stella, star Trek as te can get, but it is flawless in execution... From the Episode, 'In the Pale moonlight'