I have a very vague memory of a live-action movie or episode I watched on Swedish TV in the mid-to-late 90's, most likely in English.
The setting was on some kind of spaceship, I believe captained by a woman. One of the characters was a male alien who looked human aside from horns growing out of his forehead. These horns had some kind of ability (lightning?) that was involuntarily triggered by him sneezing.
The plot involved a video recording sent back in time by the crew's future selves warning of some kind of upcoming danger. In the recording, the alien was pointing at his own horns. Eventually, those events come to pass and the ship is in danger. The day is saved by the alien sneezing and accidentally firing his plot device horn ability at just the right thing to make the ship work again.
I seem to recall the story being kind of stupid, so I wouldn't be surprised if it was something aimed at kids or teenagers.