Michael Sarrazin Michael Sarrazin was the Canadian actor who portrayed Trevean in the episode . He is perhaps best known for starring opposite in the critically - acclaimed 1969 film , directed by . Sarrazin made his television debut in 1965 , when Alexander Singer directed him in an episode of " The Virginian " . He made his feature film debut two years later in the western " Gunfight in Abilene " , which starred TOS guest star Emily Banks . He had leading roles in three films released in 1968 : " A Man Called Gannon " , directed by James Goldstone and co - starring John Anderson , Jason Evers , and Susan Oliver ; " Journey to Shiloh " , written by Gene L . Coon and featuring Robert Pine ; and " The Sweet Ride " , with Michael Forest , Percy Rodriguez , Warren Stevens and Charles Dierkop , with uncredited appearances by William O ' Connell and Seymour Cassel . He also starred in the 1969 horror feature " Eye of the Cat " , written by Joseph Stefano . After taking a supporting role in ' s 1970 drama " Sometimes a Great Notion " ( co - starring Sam Gilman , Roy Jenson , and Cliff Potts ) , Sarrazin played the lead in the 1971 drama films " The Pursuit of Happiness " ( with Albert Henderson ) and " Believe in Me " ( with Kevin Conway ) . The following year , he co - starred in " The Groundstar Conspiracy " ( working with Cliff Potts once again , as well as Tim O ' Connor and Alan Oppenheimer ) and made an appearance in John Huston ' s " The Life and Times of Judge Roy Bean " ( with Gary Combs , Roy Jenson , and Anthony Zerbe ) . Sarrazin played the title roles in the comedy films " For Pete ' s Sake " ( 1974 ; with Vincent Schiavelli ) and " The Loves and Times of Scaramouche " ( his second film with Michael Forest ) . He also played the title role in the 1975 horror - mystery feature " The Reincarnation of Peter Proud " ( written by Max Ehrlich and again working with Albert Henderson ) . He then starred in the 1976 road race comedy " The Gumball Rally " , along with Harvey Jason and Tricia O ' Neil . His feature film credits throughout the 1980s included " Joshua Then and Now " ( 1985 ) and " Keeping Track " , both co - starring Alan Scarfe . He later played Craig Warner in two thrillers starring as former Secret Agent Harry Palmer , " Bullet to Beijing " ( 1995 ) and " Midnight in Saint Petersburg " ( 1996 ) . His final feature film was the 2002 horror - thriller " feardotcom " , which also featured Jeffrey Combs . Sarrazin returned to television in the 1980s and was prominently acting in the medium by the 1990s . In addition to his guest spot on " Star Trek : Deep Space Nine " , Sarrazin appeared on shows such as " Murder , She Wrote " ( with Meg Foster , Ed McCready , Jay Robinson , and William Windom ) , " Counterstrike " ( with Christopher Plummer ) , " Kung Fu : The Legend Continues " ( with Robert Lansing ) , and Gene Roddenberry ' s " Earth : Final Conflict " . He also co - starred in the 1989 two - part TV movie " Passion and Paradise " with Mariette Hartley and Gwynyth Walsh and in the 1998 TV thriller " Thunder Point " with John Colicos . Sarrazin died in Montreal , Canada , on 17 April 2011 following a battle with cancer . He was 70 years old .