John Hoyt John Hoyt was a veteran actor of film , television , and theater who portrayed Dr . Philip Boyce in s first pilot , . Footage of his role as Boyce was later incorporated into the two - part episode and . Hoyt filmed his scenes between Friday and Thursday , and on Monday and Tuesday , all at Desilu Culver Stage 16 . Biography . Hoyt was born John McArthur Hoysradt in Bronxville , New York . A graduate of Yale , he worked as as a teacher of history and as well as a stand - up comedian before joining Orson Welles ' Mercury Theater in 1937 , performing with the company until World War II . After serving with the Army , he returned to acting at the end of the conflict and built a career around portraying " heavies " . By the time of his retirement in 1987 , he had built up nearly 250 screen credits . He died of lung cancer in Santa Cruz , California , at the age of 85 . It is believed his participation in the 1956 film " The Conqueror " led to his demise ; 91 members of that film ' s cast and crew contracted cancer and 46 of those died of the disease , believed to be a result of filming near the nuclear weapon testing site in Nevada . Career . Broadway . Hoyt made his debut on the Broadway stage in 1930 with a role in a play called " Overture " , which ran for 41 performances . He performed in several more Broadway productions throughout the 1930s , including the musical " Ziegfield Follies of 1936 " , " The Masque of Kings " ( co - starring with Richard Hale ) , and Orson Welles ' famous 1937 Mercury Theatre production of William Shakespeare ' s " Julius Caesar " , co - starring Norman Lloyd . Hoyt would reprise his role of Decius Brutus from this play in the 1953 film adaptation of " Julius Caesar " starring Marlon Brando and also featuring Michael Ansara , Lawrence Dobkin , Richard Hale , and Ian Wolfe . Hoyt ' s last known Broadway play was the musical " Maggie " in 1953 , co - starring TOS guest actor Keith Andes . Film . Hoyt made his feature film debut with the third male lead in the 1946 war drama " O . S . S . " , co - starring TOS guest actor Richard Webb . In 1951 , he co - starred with Richard Derr in the classic science fiction film " When Worlds Collide " . The same year , he made an uncredited appearance as Wilhelm Keitel in " The Desert Fox " ( which also featured an uncredited Gil Perkins ) . Hoyt also had a supporting role in the Academy Award - nominated 1955 drama " Blackboard Jungle " , along with Richard Kiley . Five years later , Hoyt was seen in ' s epic , Oscar - winning " Spartacus " , in which Jean Simmons , Peter Brocco , Dick Crockett , and Seamon Glass were also featured , as well as William Blackburn and Gary Lockwood in background roles . The film also featured costume design by William Ware Theiss . Yet another period piece set in the days of the Roman Empire in which Hoyt appeared was the incredibly expensive 1963 epic " Cleopatra " . In addition , Hoyt co - starred with actor Whit Bissell in several films : " Brute Force " in 1947 ( also featuring Jeff Corey ) , " Lost Continent " in 1951 , " The Big Combo " and " Trial " in 1955 ( the latter co - starring Elisha Cook , Jr . ) , and " Never So Few " in 1959 ( also featuring George Takei ) . Hoyt and Bissell also appeared together on a number of television programs ( see below ) . His other many other film credits include " Sealed Verdict " ( 1948 , with Celia Lovsky ) , " Androcles and the Lion " ( 1952 , starring Jean Simmons ) , " Desirée " ( 1954 , also starring Jean Simmons ) , " Casanova ' s Big Night " ( 1954 , with Arnold Moss , " The Girl in the Red Velvet Swing " ( 1955 , starring Joan Collins ) , " Forever , Darling " ( 1956 , starring Lucille Ball and Desi Arnaz ) , " Death of a Scoundrel " ( 1956 , with Celia Lovsky ) , " Baby Face Nelson " ( 1957 , with Paul Baxley , Anthony Caruso , and Elisha Cook , Jr . ) , ' s " X : The Man with the X - Ray Eyes " ( 1963 , with Dick Miller ) , " Gunpoint " ( 1966 , with Robert Pine , Warren Stevens , and Morgan Woodward ) , " Panic in the City " ( 1968 , with Nehemiah Persoff ) , and " In Search of Historic Jesus " ( 1979 , with John Anderson , Anthony De Longis , Lawrence Dobkin , Stanley Kamel , David Opatoshu , John Rubinstein , and Nehemiah Persoff ) . Hoyt costarred with Arlene Martel ( billed as Arline Sax ) and Elisha Cook , Jr . in a 1964 mystery film called " The Glass Cage " . Hoyt was also the executive producer of this film and he co - wrote the script . In 1974 , Hoyt made a surprising appearance in the soft - core porn spoof " Flesh Gordon " , albeit in a non - pornographic role as the title character ' s father . This film also starred William Dennis Hunt and featured behind - the - scenes work from Bjo Trimble , Greg Jein and an uncredited Mike Minor . Hoyt ' s final film role was as a " Space Commander " in 1985 ' s " Desperately Seeking Susan " , co - starring Robert Joy , Tim Ransom , Timothy Carhart , and Isabel Lorca . Television . Guest appearances . Having already gained footing on stage and in film , Hoyt began to tackle television in the early 1950s . Many of his early TV work consisted of performances on live anthology programs such as " The Philco Television Playhouse " , " Fireside Theatre " , " Cavalcade of America " , " Schlitz Playhouse of Stars " , " Climax ! " , " The Ford Television Theatre " , " General Electric Theater " , " Studio One " , and three episodes of " Playhouse 90 " , including one with Skip Homeier and Richard Kiley . He also guest - starred on a great many popular Western shows throughout his career , including " The Lone Ranger " , " Gunsmoke " ( two episodes , one with Ken Lynch and another with Rex Holman ) , " Wagon Train " ( three episodes , including one with Ken Lynch ) , " The Rifleman " ( on which Bill Quinn was a regular ) , " Riverboat " ( in an episode with Madlyn Rhue ) , " Laramie " ( two episodes , one with Brian Keith and another with Frank Overton ) , " Have Gun – Will Travel " , " Death Valley Days " , " Rawhide " , " Maverick " ( three episodes in 1961 , including a two - parter with Michael Forest ) , " Twelve O ' Clock High " ( starring Robert Lansing and guest - starring Seymour Cassel and Michael Forest ) , " The Big Valley " ( with Paul Comi , Nehemiah Persoff , and Paul Sorenson ) , " The Wild Wild West " , and multiple episodes of " The Virginian " ( including one with Paul Carr , another with Perry Lopez , and a third with Robert Ellenstein ) . Another western series Hoyt appeared on was " Outlaws " in 1960 , appearing in a two - parter with William Shatner , who would go on to replace Hoyt ' s castmate Jeffrey Hunter as the star of " Star Trek " . ( The " Outlaws " episodes also featured John Anderson and Ken Lynch . ) Hoyt and " The Trouble with Tribbles " guest star Whit Bissell appeared together in an episode of another western , " Laredo " ; yet another episode of that series featured Hoyt working alongside Barbara Luna and Arnold Moss . Hoyt and Bissell also appeared together in a 1957 episode of the western anthology series " Zane Grey Theater " ; Hoyt went on to appear a few more times on that series , working with Bill Erwin and George D . Wallace in the process . He also appeared in two episodes of " Bonanza " , including a 1962 episode in which he played a vindictive judge who nearly hangs a physician who couldn ' t save the judge ' s wife . Coincidentally , the part of the physician was played by DeForest Kelley , who went on to succeed Hoyt in the role of chief medical officer of the . Interestingly enough , Hoyt also appeared in a 1959 episode of another Western , " The Rifleman " alongside Bill Quinn , who played Bones McCoy ' s father in " Star Trek V : The Final Frontier " . That episode also featured series regular Paul Fix , the man who would immediately succeed Hoyt as chief medical officer of the Enterprise . That same year , Hoyt also appeared with his future castmate from " The Cage " , Meg Wyllie in an episode of " Peter Gunn " . Reggie Nalder also appeared in that episode . Other programs on which Hoyt appeared range from sitcoms like " Make Room for Daddy " , " The George Burns and Gracie Allen Show " , " Leave It to Beaver " , " Petticoat Junction " , " The Munsters " , " Get Smart " , " The Beverly Hillbillies " , and " The Flying Nun " , to more serious shows such as , " The Untouchables " , " Dr . Kildare " , " I Spy " , " The Man from U . N . C . L . E . " , and " Ironside " . He also appeared in multiple episodes of " Perry Mason " and " Hogan ' s Heroes " . In addition , he had roles in two episodes of " The Twilight Zone " , including 1961 ' s " Will the Real Martian Please Stand Up ? " , in which he played a Martian invader who tricks people to their deaths ( opposite TOS guest actor Morgan Jones and guest actor Bill Erwin ) . He was also seen in three episodes of " The Outer Limits " , each co - starring fellow TOS alumni : " Don ' t Open Until Doomsday " with Anthony Jochim and Robert C . Johnson ; " The Bellero Shield " with Sally Kellerman ; and " I , Robot " with Marianna Hill , Peter Brocco , and Hoyt ' s castmate from " The Cage " , Leonard Nimoy . Hoyt ' s later genre credits include two guest spots on " The Time Tunnel " , on which Whit Bissell , James Darren , and Lee Meriwether were regulars , and two spots on the " Planet of the Apes " series ( along with Morgan Woodward appearing in one episode ) , as well as appearances on the cult shows " Kolchak : The Night Stalker " ( starring John Fiedler , in an episode with Paul Baxley and Andrew Robinson ) and " Battlestar Galactica " ( with John Colicos , Anthony De Longis , Lance LeGault , and Bruce Wright ) . In an episode of " The Six Million Dollar Man , " Hoyt had a small part as a scientist with David Opatoshu as another scientist . TV movies and mini - series . Hoyt was among several " Trek " alumni to have roles in the 1977 mini - series " The Rhinemann Exchange " . His fellow " Trek " kers on this series were Rene Auberjonois , Stephen Collins , Jeremy Kemp , and Katherine Woodville . Hoyt has also been cast in a handful of TV movies , including 1967 ' s " Winchester 73 " with Barbara Luna and Paul Fix ( who replaced Hoyt as the chief medical officer for " Star Trek " s second pilot ) and 1972 ' s " Welcome Home , Johnny Bristol " , which co - starred Brock Peters , Richard Evans , and Alan Bergmann . Regular roles . In 1964 , Hoyt was among the regulars of a sitcom series entitled " Tom , Dick and Mary " , but that show only lasted for twelve episodes . From 1972 through 1974 , Hoyt played the role of Martin Peyton on " Return to Peyton Place " , which co - starred fellow TOS veterans James Doohan , Julie Parrish , and Warren Stevens . Perhaps Hoyt ' s best - remembered TV role , however , is that of Grandpa Stanley Kanisky on the Nell Carter series " Gimme a Break ! " Hoyt joined the cast of this series in its second season in 1982 and stayed with it until its cancellation in 1987 , after which he retired from acting . He passed away just four years later .