The River Rat was the film debut of which actor or actress? 
The River Rat: The River Rat is a 1984 independent family film directed by Thomas Rickman and starring Tommy Lee Jones and Martha Plimpton. Martha Plimpton: Martha Campbell Plimpton (born November 16, 1970) is an American stage, film, and television actress, singer, and former model. Martha Plimpton:  Her feature film debut was in "The River Rat" (1984) before rising to prominence in the Richard Donner film "The Goonies" (1985).
Martha Plimpton