How come in the episode "Brannigan, Begin Again," Hermes says, "Star Trek," after the professor fails to compare their government to the United Nations to Fry? In a later episode of Futurama it is shown that you are not allowed to say the phrase "Star Trek."
Well, lots of things are illegal/banned, but people still do them anyways, especially in private. Hermes is prone to doing a few other illegal things as well. The episode where his son Dwight finds his 'cigar' comes to mind. "That's not a cigar! ... and it's not mine!"
The episode was written before the Star Trek episode. That is all I can provide. (I've noticed this as well)
This is what I found
"Hermes mentions the Star Trek program. However, Star Trek has been banned (4ACV11), so he shouldn't have done it. But this continuity error appears in many other episodes.
Hermes has shown numerous times that he does not care about breaking the law and, since Planet Express is privately owned, the Police wouldn't know to interfere unless someone at the company told them to."
It is one of the alternate universes that allows him to say it. This would also explain the 3 original crew backgrounds. Death by space wasps, space bees, and lost in space. We know that 3 universes exist. The original, shot Hitler, and shot Eleanor Roosevelt. This is assumed to keep a timeline.