10 Amazing Behind The Scenes Secrets Of Star Trek: Enterprise
5. Brannon Braga's Favourite Episode
Star Trek: Enterprise - In Conversation - The First Crew also included a part where Brannon Braga said that his favourite episode of the whole show was Dear Doctor.
The episode was about Doctor Phlox and the Enterprise crew debating whether or not they should interfere in an alien society in order to cure a deadly disease spreading through their society. Eventually, this conflict led to Captain Archer considering the need for a 'prime directive' to prevent Starfleet from interfering with pre-warp cultures.
Braga praised the episode for tackling an interesting and controversial challenge that 'only could've been dealt with on [Enterprise]'. Linda Park then added that she appreciated episodes like Dear Doctor for creating metaphors about real-world issues using sci-fi. The episode Stigma was also praised by the cast shortly after for the same reason.
Sci-fi allegories for real issues have existed in Trek since The Original Series, with episodes like Let That Be Your Last Battlefield. John Billingsley (and others) have said that that particular episode was a bit too on-the-nose with it's message, but other Trek, including Enterprise, has taken the concept of sci-fi metaphors to a whole new level.