Star Trek: TNG: Unification (1991)

Unification's story is another political one, with the big draw being that Ambassador Spock (Leonard Nimoy) makes his first appearance in TNG's timeline, while another important character makes their last.
Spock's scenes are some of the best parts of the work, especially the ones he shares with Picard (Patrick Stewart) and Data (Brent Spiner). In the latter case, as the two converse while working side by side to achieve the same goal we're treated to an interesting 'compare and contrast' situation: the android Data has spent much of his life wanting to be more human, while the half human/vulcan Spock has spent most of his life trying not to be.
The story references TNG's Redemption (1991) and, even further back, TOS' VI: The Undiscovered Country (1991), released in cinemas that same year.

3 ridiculous shoulder-pads out of 5