Terästyttö was released in the year 1984。Terästyttö is also called as Supergirl, Supertyttö, Supergirl: The Movie, Supergirl la ragazza d'acciaio。

Supergirl heads to earth to recover the Omegaheadron, which is the power source for her home world. The Omegaheadron falls into the hands of a second rate witch named Selena who uses it to try to take over the world. A silly subplot rears its ugly head when Selena uses a spell to make a gardener fall in love with her but he instead falls for Supergirl who now goes by the name of Linda Lee. Supergirl must now stop Selena and save the gardener.

Terästyttö actors and actresses include Brenda Vaccaro, Faye Dunaway, Hart Bochner, Matt Frewer, Mia Farrow。