which season was its final season?
Fourth season
These Are the Voyages...
"These Are the Voyages..." was written by Braga and Berman, the pair's only script of the fourth season. 
star trek enterprise these are the voyages review It was negatively received by both critics and the show's cast. is it a film? No, it is a series finale. to which series did it belong? Star Trek: Enterprise
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These Are the Voyages... [SEP] Production
"These Are the Voyages..." was written by Braga and Berman, the pair's only script of the fourth season. "Enterprise" writer Mike Sussman told TrekNation in May 2005 that Braga had considered the idea of an episode crossover featuring characters from other "Star Trek" series prior to the finale. Sussman's original idea for the episode was to have of "" treating an ill patient who may or may not have been Archer trapped in the future. Due to the subject matter, Sussman said his version would not have been suitable for the final episode. In interviews, Berman said the episode had always been intended as the season finale regardless of cancellation, and gave conflicting answers regarding whether Trip would still have been killed if the show was to continue.