Invader is a 1992 direct-to-video science fiction film by Philip J. Cook, starring Hans Bachmann, A. Thomas Smith and Rick Foucheux. It is the story of a journalist who uncovers an extraterrestrial entity taking over an air force base in Washington, D.C., and must foil its plans of world domination.

Most of Invader was produced independently in 1989 by Philip Cook and producer John Ellis, since Cook's previous film Beyond the Rising Moon had not been enough of a success to attract investors. Cook shot all the inexpensive dialogue sequences, and the result impressed Menahem Golan such that he agreed to finance the remainder of the film. Invader was originally released on VHS by Trimark and LaserDisc by Pioneer Corporation, and earned some positive reviews.

In 2006, Invader was recut by Cook's production company Eagle Films for its DVD release. The new release features CGI special effects to augment the in-camera effects from 1992.