Fred Williamson Fred Williamson is the former professional football player turned actor who appeared as Anka in , a third season episode of . He filmed his scenes on Wednesday , Friday and Monday at Desilu Stage 10 and Paramount Stage 5 . He was born in Gary , Indiana . Football career . Williamson played college football for Chicago ' s Northwestern University during the late 1950s . This was followed by a seven - year professional career in the NFL , beginning in 1960 when he was signed on with the Pittsburgh Steelers . The following year , he joined the Oakland Raiders , with whom he played four seasons . He then played three seasons with the Kansas City Chiefs . It was during this time he became known as " The Hammer " , and was a starter in the very first Super Bowl . Acting , directing , and producing . Early acting career . He moved into acting in the late 1960s ; his appearance on " Star Trek " was one of his earliest endeavors in the field . Another early television appearance was a 1969 episode of the short - lived series " The Outsider " with fellow TOS guest star Michael Strong . Williamson made his feature film debut playing Captain Oliver " Spearchucker " Jones in Robert Altman ' s irreverent 1970 comedy " M * A * S * H " . This film also marked the film debut of future " Trek " alum John Schuck and co - starred Rene Auberjonois and Sally Kellerman . From 1970 through 1971 , Williamson made regular appearances on the television sitcom " Julia " , playing the title character ' s love interest , Steve Bruce . He was a replacement for Paul Winfield , who played Julia ' s previous boyfriend , Paul Cameron . Williamson ' s co - stars on this series included fellow TOS guest actor Don Marshall . The blaxploitation era . For the remainder of the 1970s , Williamson was a fixture of action films in the " blaxploitation " genre . He also produced , directed and wrote a number of these films . He played the title role of films like " The Legend of Nigger Charley " ( 1972 ) and its 1973 sequel , " The Soul of Nigger Charley " , " Black Caesar " ( 1973 ) , " Boss Nigger " ( 1975 , which he also produced ) , and " Mean Johnny Barrows " ( 1976 , with Anthony Caruso ) , the latter of which he also directed and produced . In the 1974 blaxploitation film " Three the Hard Way " , Williams co - starred with Jay Robinson , Corbin Bernsen , and Irene Tsu . Williamson did continue to appear on television during this time , including two episodes of " Police Story " ( one with Eric Server and the aforementioned Michael Strong and the other with France Nuyen ) , an episode of " The Rookies " with Robert Ellenstein , a " CHiPs " two - parter with Michael Dorn and Robert Pine , and an episode of Ricardo Montalban ' s series " Fantasy Island " with Adrienne Barbeau . He also appeared in the 1978 mini - series " Wheels " , as did John Crawford and Stewart Moss . The 1980s . Throughout the 1980s , Williamson worked on a number of Italian B - movies , mostly science fiction action films , including " The New Barbarians " and " Bronx Warriors " ( both 1982 ) and " The New Gladiators " ( 1984 ) . He also continued directing , producing , and starring in the occasional blaxploitation film , such as 1983 ' s " The Big Score " ( co - starring Ed Lauter ) . Williamson became a regular on the short - lived TV series " Half Nelson " , which ran for seven episodes in 1985 . In addition , he co - starred with actress Persis Khambatta in the Italian science fiction film " Warrior of the Lost World " ( 1983 ) and in the 1988 direct - to - video thriller " Deadly Intent " . 1990s and 2000s . Williamson continued to produce , direct and star in action films throughout the 1990s and 2000s . He had a supporting role in Robert Rodriguez ' hit 1996 vampire blood - fest " From Dusk Till Dawn " ( with Marc Lawrence ) . More recently , he played Captain Doby in the 2004 feature film version of " Starsky & Hutch " ( with Rachael Harris and also featured an appearance by David Soul ) . Other recent film credits include the 1996 crime thriller " Original Gangstas " ( with Paul Winfield and Charles Napier ) , 1999 ' s " Whatever It Takes " ( co - starring Michael Bailey Smith , Bruce Gray , and Jimmie F . Skaggs , 2000 ' s " Submerged " ( with Michael Buchman Silver and Michael Bailey Smith ) , and 2007 ' s " Fighting Words " ( with Edward Laurence Albert and Tucker Smallwood ) .