Currently available on 2 streaming services.

Star Trek - watch online: stream, buy or rent

Currently you are able to watch "Star Trek" streaming on Netflix, Netflix Kids.

Cast

William Shatner
James T. Kirk (voice)
Leonard Nimoy
Spock (voice)
DeForest Kelley
Leonard McCoy (voice)
George Takei
Hikaru Sulu (voice)
Nichelle Nichols
Uhura (voice)
James Doohan
Montgomery Scott (voice)
Majel Barrett
Christine Chapel / Starfleet Computer (voice)