Louis M. Mann is a set designer who worked on several episodes of the first season of Star Trek: The Next Generation. He replaced fellow set designer Richard McKenzie who was unavailable.
Prior to his work on Star Trek: The Next Generation, Mann worked as set designer on Coal Miner's Daughter (1980, set decoration by John M. Dwyer), Xanadu (1980), the television drama Leave 'em Laughing (1981, with assistant property master Alan Sims), the comedy The Man Who Wasn't There (1983, with production illustrator Joseph Musso), Meatballs Part II (1984), Fletch (1985), Pretty in Pink (1986), Ferris Bueller's Day Off (1986, with Alan Ruck), Planes, Trains and Automobile (1987), and She's Having a Baby (1988).
Further credits as set designer include Tango & Cash (1989, with Teri Hatcher), Predator 2 (1990, starring Kevin Peter Hall), Almost an Angel (1990), True Identity (1991), Jennifer 8 (1992), Speed (1994), Life as a House (2001, with Scott Bakula), and the pilot episode of The Lyon's Den (2003).
Mann also worked as assistant art director on The Great Outdoors (1988), Dead Poets Society (1989, starring Robin Williams, with art direction by Sandy Veneziano), and Uncle Buck (1989). His credits as art director include Hard to Kill (1990), Sister Act II: Back in the Habit (1993, starring Whoopi Goldberg), There Goes My Baby (1994), 44 Minutes: The North Hollywood Shoot-Out (2003), Summerland (2004-2005), and Garfield: A Tail of Two Kitties (2006). In addition, Mann worked as production designer on Chicago Hope between 1994 and 2000.