
1995 NYPD Blue as Lieutenant Nathan Stackhouse. 1995 Legacy of Sin: The William Coit Story as Detective Sexton. 1995 University Hospital as John Jenkins. 1994 seaQuest DSV as The President of The USA. 1991 The Heroes of Desert Storm as Sp4 Jonathan Alston. 1991 The 100 Lives of Black Jack Savage as Jack 'Black Jack' Savage. 1990 The Court-Martial of Jackie Robinson as Satchel Paige. 1989-1990 Booker as Captain Adam Fuller. 1987-1991 21 Jump Street as Captain Adam Fuller. 1985 The Equalizer as Lieutenant Jefferson Burnett. 1984-1985 Hunter as Parker LeMay / King Hayes. 1984-1987 Hill Street Blues as Johnson / Sonny Freeman. 1982-1983 The Dukes of Hazzard as Leeman / Percy. 1981 The Marva Collins Story as McCloud. 2020 Birds of Prey as Captain Patrick Erickson.
2015 My Favorite Five as Robert Colburn. 2014 22 Jump Street as Commissioner Adam Fuller (uncredited). 2013 Jack the Giant Slayer as Master of Secrets. 2012 Who Killed Soul Glow? as Police Captain. 2009 The Fear Chamber as Captain Bradley. 2006 Special Ops: Delta Force as Smithers. 2001 Firetrap as Firefighter Chief Sheehan. 1995 Bloodfist VII: Manhunt as Captain Doyle. 1993 Jason Goes to Hell: The Final Friday as Creighton Duke. 1987 Dreams of Gold: The Mel Fisher Story as 'Mo'. 1985 Missing in Action 2: The Beginning as Captain David Nester. 1983 Twilight Zone: The Movie as Bar Patron (segment "Time Out"). 1980 The Blues Brothers as Trooper Mount. Steven has also made many guest starring appearances on television shows, including The Dukes of Hazzard, The A-Team, Booker, MacGyver, Stargate SG-1, Martin, Veronica Mars, The Bernie Mac Show, Criminal Minds and iZombie. Other film roles include playing Nester in the 1985 sequel film Missing in Action 2: The Beginning, and in the 1993 horror film Jason Goes to Hell: The Final Friday as bounty hunter Creighton Duke. He appeared in The Blues Brothers (1980) as Trooper Mount. He later played Rufus Turner in Supernatural. He starred as Russell "Linc" Lincoln in Linc's. Steven also had a recurring role as X on the Fox hit science fiction series The X-Files. August Brooks on the short lived TNT series L.A. Burnett on the CBS drama series The Equalizer in 1985.
He is known for his role as Captain Adam Fuller on the Fox Network's TV series 21 Jump Street from 1987–91. Williams later worked as a postal carrier, salesman, and model.
Williams was born in Memphis, Tennessee, and raised in Chicago, where he attended Wendell Phillips High School.