He is known for playing Clarence Boddicker in `` RoboCop '' and Red Forman in `` That '70s Show '' , and for his appearances in the genre of science fiction ( `` Star Trek '' , `` The X-Files '' ) .
He is known for playing Clarence Boddicker in `` RoboCop '' and as Red Forman in `` That '70s Show '' . He is also known for his appearances in the genre of science fiction ( `` Star Trek '' , `` The X-Files '' ) .