Best Investigation movies of 1960s

Actors : Donald Pleasence, Tom Courtenay, Peter O'Toole, Omar Sharif,
Directors : Anatole Litvak,

In 1942, a Polish prostitute is murdered in Warsaw. Suspicion falls on three generals, and Major Grau of German Intelligence seeks justice despite the ongoing atrocities committed during WWII.

Actors : Lionel Jeffries, Martha Hyer, Miles Malleson, Edward Judd,
Directors : Nathan Juran,

When a spaceship lands on the moon, it is hailed as a new accomplishment, before it becomes clear that a Victorian party completed the journey in 1899, leading investigators to that mission's last survivor.

Actors : Vincent Price, Judy Huxtable, Peter Cushing, Christopher Lee,
Directors : Gordon Hessler,

A serial killer who drains his victims' blood is on the loose in London; the police follow him to a house owned by an eccentric scientist.

Actors : Mariko Ogawa, Annu Mari, Jô Shishido, Kôji Nanbara,
Directors : Seijun Suzuki,

A hit-man, with a fetish for sniffing boiling rice, fumbles his latest job, putting him into conflict with his treacherous wife, with a mysterious woman eager for death and with the phantom-like hit-man known only as Number One.

Actors : June Travis, George Perry, Philip Morton, Lois Brooks,

A space capsule crash-lands on Earth, and the astronaut aboard disappears. Is there a connection between the missing man and the monster roaming the area?

Actors : James Robertson Justice, Arthur Kennedy, Muriel Pavlow, Margaret Rutherford,
Directors : George Pollock,

When Miss Marple reports witnessing a murder through the window of a passing train, the police dismiss her as a dotty spinster when no trace of the crime can be found.

Actors : John Mills, George Peppard, Trevor Howard, Sophia Loren,
Directors : Michael Anderson,

Allied agents attempt to infiltrate the Nazis' rocket research site.

Actors : Jeffrey Hunter, Billie Burke, Woody Strode, Constance Towers,
Directors : John Ford,

Respected black cavalry Sergeant Brax Rutledge stands court-martial for raping and killing a white woman and murdering her father, his superior officer.

Actors : Émile Genest, John Drainie, Sandra Scott, Tommy Tweed,
Directors : Fletcher Markle,

The story of three pets, a cat and two dogs, who lose their owners when they are all on vacation. Can they find their way home?

Actors : Senta Berger, Alec Guinness, Max von Sydow, George Segal,
Directors : Michael Anderson,

Two British agents are murdered by a mysterious Neonazi organization in West Berlin. The British Secret Service sends agent Quiller to investigate. Soon Quiller is confronted with Neonazi ...

Actors : Richard Widmark, Henry Fonda, Harry Guardino, Inger Stevens,
Directors : Don Siegel,

In New York City's Spanish Harlem, detectives Madigan and Bonaro are given 72 hours by their superior to capture a hoodlum wanted for homicide in Brooklyn.

Actors : Eugenie Leontovich, Patricia Breslin, Glenn Corbett, Alan Bunce,
Directors : William Castle,

The brutal stabbing murder of a justice-of-the-peace sparks an investigation of dark family secrets in a sleepy small town in Southern California.

Actors : Gayle Hunnicutt, Rita Moreno, Carroll O'Connor, James Garner,
Directors : Paul Bogart,

A young woman from Kansas hires LA private detective Philip Marlowe to find her missing brother.

Actors : Alan Bates, Bernard Lee, Diane Clare, Norman Bird,
Directors : Bryan Forbes,

When an injured wife murderer takes refuge on a remote Lancashire farm, the owners three children mistakenly believe him to be the Second Coming of Christ.

Actors : John Saxon, Titti Tomaino, Valentina Cortese, Letícia Román,
Directors : Mario Bava,

A tourist witnesses a murder and finds herself caught up in a series of bloody killings.

Actors : Sharon Walsh, Brett O'Hara, Atlas King, Ray Dennis Steckler,
Directors : Ray Dennis Steckler,

Jerry falls in love with a stripper he meets at a carnival. Little does he know that she is the sister of a gypsy fortune teller whose predictions he had scoffed at earlier. The gypsy turns him into a zombie and he goes on a killing spree.

Actors : Frank Sinatra, Ralph Meeker, Jack Klugman, Lee Remick,
Directors : Gordon Douglas,

Police detective Joe Leland investigates the murder of a homosexual man. While investigating, he discovers links to official corruption in New York City in this drama that delves into a world of sex and drugs.

Actors : Ray Barrett, Noel Willman, Jennifer Daniel, Jacqueline Pearce,
Directors : John Gilling,

In a Cornish village, various locals die from mysterious snake bites, but the coroner rules the deaths as heart attacks, until a family of newcomers starts an investigation.

Actors : Anthony Zerbe, Barbara McNair, Sidney Poitier, Martin Landau,
Directors : Gordon Douglas,

In San Francisco, a high-priced call girl is murdered and the case is assigned to Police Lieutenant Virgil Tibbs.

Actors : Gena Rowlands, Jill St. John, Richard Conte, Frank Sinatra,
Directors : Gordon Douglas,

Tony Rome, a tough Miami PI living on a houseboat, is hired by a local millionaire to find jewelry stolen from his daughter, and in the process has several encounters with local hoods as well as the Miami Beach PD.