Another category of common public domain movie is the TV-movie, a platform so presumably ephemeral that copyright protections were sometimes sufficiently slipshod to let it drop into our hands. Escape from Sobibor hit CBS in April 1987 and ITV in the UK a month later. Considering how easy it is to find today, I suspect that it fell into the public domain between then and now.

Rutger Hauer and Alan Arkin star in the story of the 1943 mass escape from the extermination camp at Sobibor, the largest escape from a prison camp of any kind in Europe during World War II, and the star power raises the production above the typical TV movie into the Internet Archive Top 100.