Films:
* The Maltese Falcon (1941): Played the role of Joel Cairo.
* The Strange Case of Doctor RX (1942): Played Dr. John Xavier.
* The Mad Doctor of Market Street (1942): Played Dr. Carl Von Kessel.
* The Mystery of Marie Roget (1942): Played Joseph Leblanc.
* The Strange Affair of Uncle Harry (1945): Played Police Inspector.
* The Falcon's Alibi (1946): Played Tony Falco.
* The Cat Creeps (1946): Played Mr. John.
* The Web (1947): Played Steve.
* The Spider Woman Strikes Back (1946): Played Dr. Paul Mannering.
* The Strange Door (1951): Played Jason.
* The Sniper (1952): Played Police Inspector.
* The Black Castle (1952): Played King.
* The Ring (1952): Played Police Inspector.
* It Came from Outer Space (1953): Played Sheriff.
* The Atomic Man (1956): Played Dr. Frederick Lundgren.
* The Incredible Shrinking Man (1957): Played Dr. Arthur Szell.
* The Deadly Mantis (1957): Played Professor Ned Jackson.
* The Thing That Couldn't Die (1958): Played Dr. John Halsey.
* The Leech Woman (1960): Played Dr. Paul Forrest.
* The Black Orchid (1962): Played Dr. Carl Hoffman.
* The Haunted Palace (1963): Played Reverend.
* The Last Man on Earth (1964): Played Dr. Morgan.
* The Human Duplicators (1965): Played Dr. Ben Parker.
* The Day the World Ended (1968): Played Police Captain.
* The Power of the Mind (1968): Played Dr. Van Der Linden.
* The Dunwich Horror (1970): Played Dr. Armitage.
* The Incredible Two-Headed Transplant (1971): Played Dr. Robert.
* The Thing with Two Heads (1972): Played Dr. Sidney.
* The Brain That Wouldn't Die (1962): Played Dr. Bill Cortner.
Television:
* The Twilight Zone (1959-1964): Appeared in several episodes, including "The Monsters are Due on Maple Street" and "The Invaders."
* Alfred Hitchcock Presents (1955-1962): Appeared in multiple episodes.
* The Outer Limits (1963-1965): Appeared in episodes like "The Bellero Shield" and "The Galaxy Being."
* Perry Mason (1957-1966): Appeared in numerous episodes.
* The Fugitive (1963-1967): Appeared in episodes like "The Price of Justice" and "The Deadly Game."
* The Man from U.N.C.L.E. (1964-1968): Appeared in episodes like "The Concrete Overcoat Affair" and "The Deadly Game."
* Mission: Impossible (1966-1973): Appeared in episodes like "The Executioner" and "The Photographer."
* The Wild Wild West (1965-1969): Appeared in episodes like "The Night of the Assassin."
* Star Trek (1966-1969): Appeared in the episode "The Devil in the Dark."
* I Spy (1965-1968): Appeared in an episode titled "The Death of the Red Dragon."
This list is not exhaustive, but it highlights some of Michael Lombard's most notable film and television appearances. He was a versatile actor who excelled in both dramatic and comedic roles. He was particularly known for his work in science fiction and horror films.