Although he played an uncredited bit role in the silent film
What Price Glory? (1926), Naish said his screen career didn't actually begin until 1930, when stage actors were being recruited for the new talking pictures. He became a prolific supporting actor, appearing in more than 200 films. He was twice nominated for an
Academy Award for Best Supporting Actor, the first for his role as Giuseppe in the movie
Sahara (1943), in which he delivers the
propaganda speech: Mussolini is not so clever like Hitler, he can dress up his Italians only to look like thieves, cheats, murderers, he cannot like Hitler make them feel like that. He cannot like Hitler scrape from their conscience the knowledge right is right and wrong is wrong, or dig holes in their heads to plant his own Ten Commandments- Steal from thy neighbor, Cheat thy neighbor, Kill thy neighbor! But are my eyes blind that I must fall to my knees to worship a maniac who has made of my country a concentration camp, who has made of my people slaves? Must I kiss the hand that beats me, lick the boot that kicks me? NO! The second was for his performance as the title character's Hispanic father in the movie
A Medal for Benny (1945). In 1957–1958, Naish played the lead role in the television series
The New Adventures of Charlie Chan. Speaking in 2023, co-star
James Hong said Naish had him fired from the series just because Hong had missed a single line, and accused Naish of having held "a deep prejudice". Naish worked mostly in guest roles on television through the 1960s; his most recent motion picture credit was from 1964. In 1971, the 75-year-old actor was coaxed out of retirement by producer and horror-film enthusiast Samuel M. Sherman to star in a new big-screen thriller,
Dracula vs. Frankenstein (
1971). Naish played a descendant of the original
Dr. Frankenstein, who takes to murdering young women for experimentation in hopes of reviving his ancestor's creation. His mute assistant was played by
Lon Chaney Jr. Dracula vs. Frankenstein was the last film of both Naish and Chaney. ==Personal life and death==