Les aventures vécues au XXIIIe siècle, par James T. Kirk, capitaine du vaisseau Entreprise NCC-1701 et son équipage. Leur mission quinquennale est d'explorer la galaxie afin d'y découvrir d'autres formes de vie et d'enrichir ainsi les connaissances humaines.
Cast members of the television and movie series "Star Trek" reminisce about the making of the series and the films, and give their opinions on why the series has been so successful. Star Trek: A Captain's Log was originally aired on television and was edited into William Shatner's Star Trek Memories for video. Both titles are made of the same footage and are virtually the same.