"They Saved Hitler's Brain", despite bearing a 1963 copyright, was released years later. The 1963 film The Madmen of Mandoras (1963) was combined with new footage of "CID" agents Vic and Toni shot for the film and released to television as "They Saved Hitler's Brain". The Vic and Toni footage was clearly shot years later; the hairstyles and fashions did not become popular until the late 1960s.
The car crash in which Vic dies is stock footage from Thunder Road (1958).
Final film of Nestor Paiva.
There's a scene in Mandoras where a small airplane circles and then lands in order to drop off an Army general. The tail number (registration number) is visible in one of the scenes (N4328C). Upon researching it, that airplane, a 1955 Aeronca Champ 7EC, is still flying as of 5/13 and is based in Modesto, CA. However, as of 5/13 it's for sale.
In their book, *The Golden Turkey Awards*, Harry and Michael Medved awarded this film top honors in the category, Most Brainless Brain Movie.
Despite claiming a 1968 copyright, the tail lights on the VW Beetle that Toni drives did not come into use until 1973. This supports other commenters that mention a 1970s date for the added footage.
To save money, music from other Crown International Pictures The Devil's Hand (1961) was used.
In the original movie The Madmen of Mandoras (1963), Hitler's head melts down to a bare charred skull. This sequence was evidently shortened to make it less graphic and thus more family-friendly.