After sitting on the shelf for some time, Teen Wolf was released on the heels of the hugely successful Back to the Future in an attempt to cash in on the huge popularity of star Michael J. Fox. Teen Wolf chronicles the plight of Fox as a small-town nerd who can't seem to score a basket on the court or a point with his dream girl.
Things change, however, once he discovers his family's hereditary secret, lycanthrope. As he begins to look hairier and hairier, his team begins to win basketball games and his dream girl begins to show interest in his unusual talent. His story does not progress without complications, however.
His best friend, an opportunistic weasel, begins to exploit him beyond his limits of toleration, and his dream girl is captive to the requisite bully boyfriend, who, of course, captains the arch-rival basketball team. And then, to top it all off, Fox's other best friend is in love with him.
Unbelievably, this film was a box-office success and eventually inspired an even worse sequel, Teen Wolf Too, several years later -- a film which Fox wisely declined.