My Stepmother is an Alien(1988)
An alien is sent on a secret mission to Earth, where she appears as a gorgeous, attractive, and single lady. Her mission is to make contact with a rather nerdy young scientist, who's quite overwhelmed by her attentions, and isn't aware of the connection between her arrival and his work.
This is a teaser TV spot for the movie. There's a quick "Donahue" promo at the end that I unfortunately couldn't edit off.
This trailer was originally posted to YouTube by
This is a brief spot for a CBS airing of the movie.
Originally posted to YouTube by NightTracksX, this is the music video for Animotion's soundtrack contribution "Room To Move".