Best Investigation movies of 1960s

Actors : Andrew Cruickshank, Charles 'Bud' Tingwell, Margaret Rutherford, Ron Moody,
Directors : George Pollock,

When Miss Marple joins a theatrical company after a blackmailer is murdered, several members of the troupe are also dispatched by this mysterious killer.

Actors : Charles 'Bud' Tingwell, Lionel Jeffries, Margaret Rutherford, William Mervyn,
Directors : George Pollock,

After Miss Marple is made a trustee of a merchant marine training vessel, a fellow trustee is poisoned, and ship's officers are later murdered after she comes on board.

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.

Actors : Raquel Welch, Richard Conte, Frank Sinatra, Martin Gabel,
Directors : Gordon Douglas,

During an ocean dive, Miami gumshoe Tony Rome finds a woman's body with its feet encased in a concrete block and sets-out to solve the murder case.

Actors : Telly Savalas, Curd Jürgens, Diana Rigg, Oliver Reed,
Directors : Basil Dearden,

A woman causes a group of assassins to face their greatest challenge.

Actors : Susan Hayward, Capucine, Rex Harrison, Cliff Robertson,
Directors : Joseph L. Mankiewicz,

Inspired by a performance of his favorite play, "Volpone," 20th-century millionaire Cecil Fox devises an intricate plan to trick three of his former mistresses into believing he is dying. ...

Actors : Robert Mitchum, Dean Martin, Roddy McDowall, Inger Stevens,
Directors : Henry Hathaway,

The players in an ongoing poker game are being mysteriously killed off, one by one.

Actors : Rod Steiger, Eileen Heckart, George Segal, Lee Remick,
Directors : Jack Smight,

A crafty serial killer plays a game of cat-and-mouse with a harried police detective trying to track him down.

Actors : Pina Pellicer, Ignacio López Tarso, Mario Alberto Rodríguez, Enrique Lucero,
Directors : Roberto Gavaldón,

Poor, hungry peasant Macario longs for just one good meal on the Day of the Dead. After his wife cooks a turkey for him, he meets three apparitions, the Devil, God, and Death. Each asks him...

Actors : Dolores Dorn, Beatrice Kay, Paul Dubov, Cliff Robertson,
Directors : Samuel Fuller,

Fourteen-year-old Tolly Devlin sees four hoods beat his father to death. Twenty years later, the killers have risen to the top of the crime syndicate and Tolly has a plan for revenge.

Actors : Ray Sager, Wayne Ratay, Phil Laurenson, Judy Cler,
Directors : Herschell Gordon Lewis,

A TV talk-show hostess and her boyfriend investigate a shady magician whom has the ability to hypnotize and control the thoughts of people in order to stage gory on-stage illusions using his powers of mind bending.

Actors : Ignacy Machowski, Oldrich Lukes, Yôko Tani, Julius Ongewe,
Directors : Kurt Maetzig,

When an alien artifact discovered on Earth is found to have come from Venus, an international team of astronauts embarks to investigate its origins.

Actors : Maurice Chevalier, Hayley Mills, George Sanders, Wilfrid Hyde-White,
Directors : Robert Stevenson,

In 19th century England, young Mary Grant and her brother, Robert, embark on a dangerous quest to find their missing father, a sea captain who vanished somewhere along the Chilean coast.

Actors : Peter Cushing, Yvonne Romain, Patrick Allen, Oliver Reed,
Directors : Peter Graham Scott,

In 18th-century England, the Royal Crown sends Royal Navy Captain Collier and his crew to investigate reports of illegal smuggling and bootlegging in a coastal town where locals believe in Marsh Phantoms.

Actors : Edward de Souza, Herbert Lom, Heather Sears, Thorley Walters,
Directors : Terence Fisher,

Terror strikes the London Opera House as a new opera is disrupted by the actions of a deformed specter of the show's past who has an obsession with one of the production's chorus girl.

Actors : James Mason, Harriet Andersson, Simone Signoret, Maximilian Schell,
Directors : Sidney Lumet,

A British agent sets out to uncover the hidden facts behind a British government employee's suicide.

Actors : Jean Anderson, Patrick McGoohan, Laurence Naismith, Susan Hampshire,
Directors : Don Chaffey,

Thomasina the cat brings a family together, through her mysterious death and reappearance.

Actors : Burgess Meredith, Peter Cushing, Beverly Adams, Jack Palance,
Directors : Freddie Francis,

An anthology of four short horror stories about people who visit Dr. Diabolo's fairground haunted-house attraction show.

Actors : Don Knotts, Jackie Coogan, Don 'Red' Barry, Barbara Rhoades,
Directors : Alan Rafkin,

A pardoned stagecoach robber, becomes government agent and marries a naive unsuspecting east-coast dentist in order to join a wagon train and catch the smugglers who have been selling guns to the Indians.

Actors : Wendell Corey, Joan Patrick, Tom Pace, John Carradine,
Directors : Ted V. Mikels,

The Plan - to build a super human; How? - by murdering innocent convenient victims and using various bits of them; The Result - Creatures on the rampage.