Goofs

When Trumbull and Gillie are going on their first desperate mission, they ride the hearse after midnight, but it's clearly day outside.

When at the crypt, the coffin is seen twice from the outside appearing immediately behind the entrance gate - inside the coffin is clearly about ten feet from the gate.

When Gillie is climbing the roof to get inside Black's house, the room is black from the outside, but when the inside is shown, room is lit.

When Mr. Black swings his sword at the three red candles, it is obvious that the candles have been previously cut and stuck back together - they aren't even straight.

Peter Lorre's stunt double is quite obvious. He is clearly a younger man with longer, darker hair and wearing a Lorre mask.

When Trumbull and Gillie are fighting with swords, their stunt doubles are obvious.

In the movie, whenever a candle is lit, the light that appears is bigger than the lit candle would provide and sometimes it appears before the candle itself is even lit.

After his murder of Mr. Phipps, Trumbull waits inside the horse-drawn hearse. He is shown lying width-wise with his knees drawn up, with black or purple draperies completely covering the inside, while the top half of Gillie can be seen sitting in the driver's seat through a large square opening in the front of the hearse. However, in all other shots of the hearse, no draperies can be, seen through the frosted glass, the hearse itself is not wide enough to accommodate a person lying that way, and there is no window in the front behind the driver; the roof of the hearse reaches up only to the middle of the driver's back.

At the start of the movie when Trumbull and Gillie take the coffin out of the grave and put it next to it, they clean it and then start shoveling the dirt in the hole, which would make the coffin dirty again, but it doesn't.