Brooklyn-born Don Diamond's most famous role is probably that of the scheming and ambitious, but inept and somewhat cowardly, underling Crazy Cat to Frank DeKova's Chief Wild Eagle in the cult western comedy series F Troop (1965). By the time he got that role he had been an actor for quite some time, starting out in radio in the early 1940s, where he discovered that he had a knack for picking up dialects, especially Spanish. He became so proficient in it that many believed he was actually Spanish or Mexican, when in reality his family came from Russia. His facility in that dialect got him the role as the Mexican sidekick of Kit Carson in the early TV series The Adventures of Kit Carson (1951). He also landed a recurring part as a Spanish corporal in the Disney TV series Zorro (1957). In addition to his TV and film work, he did much voice-over work in both cartoons and commercials.
1986Life with Lucy (1 Episode) as Man #2
1986L.A. Law (1 Episode) as Trustee Lloyd
1985MacGyver (1 Episode) as Archbishop Fierro
19841st & Ten (1 Episode) as Papa Voytak
1983Zorro and Son (1 Episode) as Unknown
1982Newhart (1 Episode) as Unknown
1982The Kid with the Broken Halo as Giuseppe
1981The New Adventures of Zorro (13 Episodes) as Unknown
1981Hill Street Blues (1 Episode) as Unknown
1981Dynasty (1 Episode) as Unknown
1980Herbie Goes Bananas as Local #2
1980This Year's Blonde as Lacey's Captain
1979Paris (1 Episode) as Sam
1979When the West Was Fun: A Western Reunion as Self
1978The White Shadow (1 Episode) as Salvation Army Man
1978Vega$ (1 Episode) as Unknown
1978WKRP in Cincinnati (2 Episodes) as Delivery Man # 1
1978The Toolbox Murders as Sgt. Cameron
1977Lou Grant (1 Episode) as Harry
1977The Hardy Boys / Nancy Drew Mysteries (1 Episode) as Unknown
1976Quincy, M.E. (1 Episode) as Printer
1976The Rear Guard (1 Episode) as Foster
1975One Day at a Time (1 Episode) as Unknown
1975Ellery Queen (1 Episode) as Police Officer (uncredited)
1975Shell Game as Chauffeur
1974The Rockford Files (1, 1 Episode) as Lt. Alvarez, Coelho
1973Breezy as Maitre 'D
1973Police Story (1 Episode) as Unknown
1973Hawkins (1 Episode) as Reporter #1
1972Hit Man as Nano Zito
1972The Judge and Jake Wyler as 1st Workman
1972The Streets of San Francisco (1, 1 Episode) as Unknown, Cook
1972Frog Jog as Toro (voice)
1972Flight to the Finish as Toro (voice)
1971Croakus Pocus as Toro (voice)
1971Serape Happy as Toro (voice)
1971What's a Nice Girl Like You...? as Duty Sergeant
1971How to Steal an Airplane as Sam
1971Owen Marshall: Counselor at Law (1 Episode) as Clerk
1971Columbo (1, 1 Episode) as Larry, Portland Desk Clerk (uncredited)
1971Cannon (1 Episode) as Unknown
1971Fastest Tongue in the West as Toro (voice)
1971A Leap in the Deep as Toro (voice)
1971The Egg and Ay-Yi-Yi! as Toro (voice)
1971Two Jumps and a Chump as Toro (voice)
1971Mud Squad as Toro (voice)
1971Mrs. Pollifax — Spy as DeGamez
1971Snake in the Gracias as Toro (voice)
1970A Dopey Hacienda as Toro (voice)
1970The Odd Couple (1 Episode) as Man at OTB
1970The Immortal (1 Episode) as Unknown
1970Never on Thirsty as El Toro (voice)
1970Hop and Chop as Toro (voice)
1970The Froggy Froggy Duo as Toro (voice)
1969Go for Croak as Toro (voice)
1969A Pair of Greenbacks as Toro (voice)
1969Viva Max! as Hernandez
1969Love, American Style (1 Episode) as Gus
1969Tijuana Toads as Toro (voice)
1969Tijuana Toads (17 Episodes) as Toro
1968Here's Lucy (1 Episode) as Pedro
1968Adam-12 (1, 1 Episode) as Clerk, Sailor
1968It Takes a Thief (1 Episode) as Messenger
1967The High Chaparral (1 Episode) as Miguel
1967The Guns of Will Sonnett (1 Episode) as Unknown
1967The Flying Nun (1, 1, 1 Episode) as Unknown, Dr. Tapia, Dr. Escovito
1967Good Morning World (1 Episode) as Moving Man
1966That Girl (1 Episode) as Unknown
1965Get Smart (1 Episode) as Unknown
1965The Wild Wild West (1 Episode) as The Bartender
1965The Big Valley (1, 1, 1 Episode) as Border, Diego, Federale
1965F Troop (65 Episodes) as Crazy Cat
1965Run for Your Life (1, 1 Episode) as Esteban, Taxi Driver
1964Gomer Pyle, U.S.M.C. (1 Episode) as Unknown
1963Kraft Suspense Theatre (1 Episode) as Paco
1963My Favorite Martian (0, 1 Episode) as Unknown, Judge Gonzales
1963Redigo (4 Episodes) as Arturo
1963Burke's Law (1 Episode) as Romeo
1963The Patty Duke Show (1 Episode) as Unknown
1961The Dick Van Dyke Show (1 Episode) as Unknown
1961Swingin' Along as Tony
1960Route 66 (1 Episode) as Unknown
1960Pete and Gladys (2 Episodes) as Unknown
1960The Story of Ruth as Yomar
1959The Untouchables (1, 1 Episode) as George Keeley, Mob Pit Boss (uncredited)
1959Zorro, the Avenger as Corporal Reyes
1959Holiday for Lovers as Airplane steward
1959Rawhide (1, 1, 1 Episode) as Mexican Cowhand, Paco (uncredited), Tony
195877 Sunset Strip (1, 1 Episode) as Unknown, Taxi driver (uncredited)
1958The Old Man and the Sea as Cafe Proprietor (uncredited)
1958Peter Gunn (1 Episode) as Unknown
1958Le Secret de Zorro as Caporal Reyes
1957Raiders of Old California as Pepe
195726 Men (2 Episodes) as Unknown
1957Zorro (21, 2, 1, 3, 12 Episode) as Corporal Reyes, Corp. Reyes (uncredited), Lancer Hivarro (uncredited), Cpl. Reyes, Corp. Reyes
1957Trackdown (1, 1 Episode) as Unknown, Sheriff
1956Dick Powell's Zane Grey Theatre (1, 1 Episode) as Jones - Outlaw, Cota
1956The Gale Storm Show (1, 1, 1 Episode) as Unknown, Capt. Alicante, Chief of Police
1955Frontier (1 Episode) as Unknown
1955The Life and Legend of Wyatt Earp (2, 1 Episode) as Unknown, Stevens - Suspect (uncredited)
1954Studio 57 (1 Episode) as Unknown
1954Lassie (1 Episode) as Unknown
1952Adventures of Superman (1 Episode) as Harry Fix
1951The Adventures of Kit Carson (103 Episodes) as Unknown
1950Borderline as Deusik
1949The Lone Ranger (1 Episode) as Pedro Matinez