You will find an overview of the different sources here, where the pictures of the Star Trek First Edition cards come from.
TV shows:
The Original Series ( 153 cards )
The Next Generation ( 1224 cards )
Deep Space Nine ( 1201 cards )
Voyager ( 518 cards )
Enterprise ( 381 cards )
Movie pictures:
Star Trek: The Motion Picture ( 17 cards )
Star Trek II: The Wrath of Khan ( 43 cards )
Star Trek III: The Search for Spock ( 22 cards )
Star Trek IV: The Voyage Home ( 21 cards )
Star Trek V: The Final Frontier ( 14 cards )
Star Trek VI: The Undiscovered Country ( 37 cards )
Star Trek: Generations ( 41 cards )
Star Trek: First Contact ( 195 cards )
Star Trek: Insurrection ( 36 cards )
Star Trek: Nemesis ( 24 cards )
Unidentified (card) pictures:
Overview of the currently unidentified Star Trek First Edition card pictures ("Unknown episode").
Other Sources:
Pictures that don`t come from any show or moviev but form promotional shots or other non official Star Trek sources.
Promotional shots and other non-official sources (106 cards)
Missing information about (card) pictures:
Overview of cards without any information of thier Star Trek First Edition card pictures.
