Question: The River Rat was the film debut of which actor or actress? 

Context articles: KPKR
Martha Plimpton
Dust to Dust (Pete Nice and DJ Richie Rich album)
Jiang Ping (The Seven Heroes and Five Gallants)
Lumberman's Monument
The River Rat
Stowmarket
River Rat
KSBV
Tony Frank (actor)

KPKR (95.7 FM, "95.7 Jack FM") is an American radio station licensed to serve the community of Parker, Arizona.
 The station, established in 2008, is currently owned by River Rat Radio, LLC.
 It broadcasts an adult hits music format to the greater Lake Havasu City, Arizona, area.
Martha Campbell Plimpton (born November 16, 1970) is an American stage, film, and television actress, singer, and former model.
 Her feature film debut was in "The River Rat" (1984) before rising to prominence in the Richard Donner film "The Goonies" (1985).
 She has also appeared in "The Mosquito Coast" (1986), "Running on Empty" (1988), "Parenthood" (1989), "Samantha" (1992), "Raising Hope" (2010) and "Small Town Murder Songs" (2011).
Dust to Dust is an album by former 3rd Bass members, Pete Nice (Prime Minister Pete Nice) and DJ Richie Rich (Daddy Rich).
 The album was released on July 13, 1993 for Def Jam Recordings and was produced by Pete Nice, DJ Richie Rich, KMD and Psycho Les.
 Dust to Dust was released a year after the breakup of 3rd Bass and featured many disses toward their former bandmate MC Serch.
 "Dust to Dust" found limited success, peaking at #171 on the "Billboard" 200, #50 on the Top R&B/Hip-Hop Albums and #3 on the Top Heatseekers.
 Two singles were released: "Rat Bastard" and "Kick The Bobo," both apparent disses against former bandmate MC Serch.
 The video for "Rat Bastard" starts out as a recreation of a scene from the 1987 film "The Untouchables", with Pete Nice beating an MC Serch lookalike to death with a baseball bat.
 The video for "Kick the Bobo" starts out as a recreation of a scene from the 1983 film "Scarface", with Pete Nice talking to a Tony Montana lookalike.
 This album also marks the professional debut of Indie Rap artist, Cage Kennylz.
 The album is now out of print.
Jiang Ping, courtesy name Zechang, is a fictional Song dynasty knight-errant from the 19th-century Chinese novel "The Seven Heroes and Five Gallants".
 Nicknamed "River Rat" for his amazing swimming and freediving skills, he was able to stay underwater seemingly forever.
Lumberman's Monument is a monument dedicated to the workers of the early logging industry in Michigan.
 Standing at 14 feet, the bronze statue features a log surrounded by three figures: a timber cruiser holding a compass, a sawyer with his saw slung over his shoulder, and a river rat resting his peavey on the ground.
 The granite base of the statue is engraved with a memorial that reads "Erected to perpetuate the memory of the pioneer lumbermen of Michigan through whose labors was made possible the development of the prairie states."
 It is also inscribed with the names of the logging families who dedicated their time and efforts to the industry in the area.
 It was built in 1931, dedicated in 1932 and is managed by the USDA Forest Service.
 It is located in the northeastern part of the Lower Peninsula of Michigan along the Au Sable River within Huron-Manistee National Forests.
 Access to the park is on River Road, which intersects M-65 west of Oscoda, Michigan.
 Monument Road, from East Tawas, also leads directly to the monument, which is in Oscoda Township in Iosco County.
 The monument is part of the River Road Scenic Byway, a 22 mi drive between Oscoda and South Branch that runs parallel with the beautiful Au Sable River.
 It is a designated National Scenic Byway.
The River Rat is a 1984 independent family film directed by Thomas Rickman and starring Tommy Lee Jones and Martha Plimpton.
 Filmed on location in Kentucky, on the banks of the Mississippi River.
Stowmarket ( ) is a small market town in Suffolk, England, on the busy A14 trunk road between Bury St Edmunds to the west and Ipswich to the southeast.
 The town is on the main railway line between London and Norwich, and lies on the River Gipping, which is joined by its tributary, the River Rat, to the south of the town.
The River Rat is a river in the county of Suffolk in East Anglia, England.
KSBV (93.7 FM, "The River Rat") is a radio station broadcasting a classic rock music format.
 Licensed to Salida, Colorado, United States.
 The station is currently owned by Marc Scott, through licensee Arkansas Valley Broadcasting, Inc.
Tony Frank (December 9, 1943 – April 18, 2000) was an American television actor who is best remembered for playing the sadistic plantation overseer Salem Jones in "North and South" (1985-86).
 He has also acted in films such as "The River Rat" (1984), "Extreme Prejudice" (1987), "Talk Radio" (1988), "Born on the Fourth of July" (1989), "Riverbend" (1989), "Rush" (1991) and "Lone Star" (1996).