The Echo Murders (1945) is a fast-paced but critically middling British “B” movie which follows fictional detective Sexton Blake- often viewed as Britain’s “cut-price Sherlock Holmes”- as he uncovers a Nazi fifth-column invasion plot while investigating a mine owner’s murder in Cornwall.

The film, directed by John Harlow, stars David Farrar as the dashing, two-fisted sleuth alongside Dennis Price. While it offers a fun, “blood and thunder” period adventure, it is widely regarded as a flawed thriller.