10 Forgotten Public Domain Mystery Films Worth Discovering

While the B-Western was Hollywood's most prolific B-genre, the B-mystery wasn't far behind. The same Poverty Row studios that churned out 700 Westerns between 1935 and 1945 also produced hundreds of murder mysteries, detective serials, and locked-room puzzles. Most are now in the public domain. Ten of the genre's most rewarding entries:

1. The Strange Love of Martha Ivers (1946)

An A-list noir that slipped into the public domain due to a botched copyright renewal. Barbara Stanwyck, Van Heflin, and Kirk Douglas (in his screen debut) circle each other in a small Pennsylvania town haunted by a childhood murder. The picture's plot intricacy is more Patricia Highsmith than typical 1940s mystery.

2. D.O.A. (1949)

One of the most influential film-noir mysteries — a man walks into a police station to report his own murder. Edmond O'Brien plays Frank Bigelow, a small-town accountant who has been slipped a slow-acting poison and now has 48 hours to find his killer. The picture's public-domain status means it's been remade, rip-offed, and homaged for sixty years.

3. The Stranger (1946)

Orson Welles directed and starred — playing a Nazi war criminal hiding as a small-town New England teacher. Edward G. Robinson investigates. The picture is taut, technically accomplished, and one of the rare Welles films readily available in the public domain.

4. Detour (1945)

The cheapest and most influential film noir ever made. Made in five days for under $30,000, Edgar G. Ulmer's Detour follows a piano player hitchhiking from New York to Los Angeles who picks up a femme fatale named Vera (Ann Savage in one of the most ferocious performances of the era). Genuinely upsetting — and a cornerstone of the noir tradition.

5. The Hitch-Hiker (1953)

Directed by Ida Lupino — one of the few female directors of the studio era — and based on the real case of mass murderer Billy Cook. Two fishing buddies pick up a hitchhiker who turns out to be a serial killer. The picture's atmosphere of mounting desperation is the cleanest distillation of the post-war noir mood you'll find.

6. Charlie Chan in Paris (1935)

One of the few public-domain entries in the long-running Charlie Chan series. Warner Oland plays the Honolulu detective investigating financial fraud against the backdrop of pre-war Paris. The mysteries hold up better than you'd expect.

7. Bulldog Drummond's Bride (1939)

The last of the John Howard Drummond series — a pulp-action mystery about a former WWI officer turned amateur detective. Drummond and his fiancée get pulled into a kidnapping plot on the eve of their wedding. Brisk, funny, and significantly better-made than the average B-mystery of the era.

8. Scarlet Street (1945)

Edward G. Robinson, Joan Bennett, and Dan Duryea in a Fritz Lang noir about a meek cashier seduced into a con. The picture's bleakness was genuinely shocking in 1945 — and arguably contributed to the Production Code's growing leniency in the late 1940s.

9. The Strange Woman (1946)

Hedy Lamarr as a manipulative woman in 1820s Maine whose schemes drive every man around her to ruin. Director Edgar G. Ulmer (also of Detour) somehow elevates poverty-row materials into something approaching gothic tragedy.

10. Beat the Devil (1953)

John Huston directed Humphrey Bogart in this comic noir about a band of con artists scheming over Ugandan uranium rights. Public domain due to a copyright renewal mistake. The screenplay (by Truman Capote, of all people) anticipates the Coen Brothers by forty years.

What the B-mystery shared with the B-Western

The same studio-system economics that produced the B-Western produced the B-mystery. Five-day shoots, $30,000-50,000 budgets, 65-75 minute runtimes, double-bill bottom-half placement. Many of the same directors (Lesley Selander, William Witney, Edward Cahn) worked in both genres. The B-mystery's audience was older — adults and teens rather than the Saturday matinee crowd — but the production logic was identical.

Why these films are public domain

Same reasons as the B-Westerns — failed copyright renewals, defunct distributors, lost paperwork. Many of the films above were originally A-list productions from major studios whose copyrights lapsed through clerical error. D.O.A., The Stranger, and Beat the Devil are all examples of A-pictures whose rights-holders failed to file the necessary paperwork at the 28-year mark.

Where to start

For the noir entry point: D.O.A. (1949) — it's short, hooky, and the print quality is reliably good. For the proto-noir of the early 1940s: Detour (1945). For Welles: The Stranger (1946). All public domain, all streaming free in our archive, and any one of them will pull you into a parallel American film tradition that ran alongside the Westerns and arguably produced just as much enduring work.