Somehow this is turning into a mini-series, “science fiction characters singing” (although the first video is not an original scene from a Star Trek show, sadly, now that would have been a fantastic contribution to TNG).
Stargate:SG1 was a great show, at least Season 1-7. After that I stopped watching each time because they changed too many things to keep up the original atmosphere. So here the main characters are, singing.
Next time I’ll post something from The X-Files ;)
There also is another Star Trek: Voyager clip including singing, but I dread posting it (it features the holographic Doctor singing opera while imagining being a hero … vicarious embarrassment galore *cringe*)