- HD 1080
- Runtime: 98m.
- Status: Released
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- Languages: en
- Country: United States of America
- Director: Martha Coolidge
- Stars: Arliss Howard, Suzy Amis, George Wendt, Diane Ladd, Seymour Cassel
- keywords: high school, murder, undercover cop, teacher student relationship, woman director
- Production_studio: Sierra Alta Productions, Paramount Pictures
- Slogan: An Undercover Nightmare.
- The Plain Clothes is featured in the top rankings of 1988
- #67 in Top Comedy Movies of 1988
- #28 in Top Romance Movies of 1988
- #29 in Top Action Movies of 1988
- #35 in Top Crime Movies of 1988
- #26 in Top Thriller Movies of 1988
- #9 in Top Mystery Movies of 1988
To prove his brother's innocence, undercover officer Nick enrolls in high school again, dealing with crushes, bullies, humiliations, popularity swings, and quirky teachers and staff to find the real murderer.
