Peter Cushing

Peter Cushing (1913 - 1994)

Film Deaths

The Black Knight (1954) [Sir Palamides]: Stabbed in the stomach by Alan Ladd as he tries to bludgeon him with a mace, knocked down the stone staircase into the courtyard. (Thanks to Brian)

Alexander the Great (1956) [Memnon]: Killed in combat with Richard Burton's army, after Peter's offer of surrender is rejected. (Thanks to Garrett)

The Curse of Frankenstein (1957) [Baron Victor Frankenstein]: Presumably executed by the guilotine (off-screen); the film ends with him being esscorted from the prison. The 1958 sequel The Revenge of Frankenstein reveals that he escaped just before his execution, but this was originally intended to be a death beofre they decided to make a sequel, so I'll list it.
The Revenge of Frankenstein (1958) [Baron Frankenstein]: Beaten to death by his patients in the hospital ward. He is brought back to life in his laboratory when Francis Matthews transplants his brain into a body that strongly resembles him (which Peter prepared earlier on). He survives the rest of the film afterwards.

Sword of Sherwood Forest (1960) [Sheriff of Nottingham]: Stabbed repeatedly in the back by Oliver Reed when he refuses to go along with Richard Pasco's evil plans. (Thanks to Garrett and Uwe)

Night Creatures (Captain Clegg) (1962) [Rev. Dr. Blyss a.k.a. Captain Clegg]: Shot with a harpoon when Milton Reid fires it at Michael Ripper, and Peter throws himself in front of Michael. (Thanks to Garrett and Uwe)

The Evil of Frankenstein (1964) [Baron Frankenstein]: Presumably killed (off-screen) in an explosion after being trapped in his burning laboratory. He returned in 1967's Frankenstein Created Woman, but that film is a reboot rather than a sequel, so it's safe to assume this was a death.
The Gorgon (1964) [Dr. Namaroff]: Turns to stone (off-screen) after accidently looking into the Gorgon's (Prudence Hyman) eyes while trying to behead her in the castle. His body falls out of shot before he turns to stone and it is never shown, but the indication is clear.
The Skull (1965) [Dr. Christopher Maitland]: Bitten on the throat (off-screen) by the disembodied skull in his bedroom. The scene ends as the skull floats towards him; his body is shown afterwards when Jill Bennett discovers him the next morning.
Frankenstein Created Woman (1967) [Baron Frankenstein]: Frozen to death by Thorley Walters and Robert Morris (off-screen) as Peter instructed in order to test his experiment in his laboratory. His body is shown afterwards when Thorley and Robert unfreeze him, bringing him back to life. He survives the rest of the film afterwards.

Night of the Big Heat (Island of the Burning Doomed) (1967) [Dr. Vernon Stone]: Dies of heatstroke when the aliens raise the temperature around him. (Thanks to Garrett)

Torture Garden (1967) [Lancelot Canning]: Bludgeoned to death with a candlestick by Jack Palance during a struggle in Peter's cellar.

Corruption (Carnage; Laser Killer) (1968) [Sir John Rowan]: Slashed/burned to death by the surgical laser in his laboratory after it goes out of control. (The entire movie turns out to be Peter's dream, but the final scene indicates that it's coming true.)

Scream and Scream Again (Screamer) (1969) [Benedek]: Killed when Marshall Jones applies a death-grip to his shoulder in Peter's office.

Frankenstein Must be Destroyed (1969) [Baron Frankenstein]: Presumably burned to death (off-screen) after Freddie Jones carries him into a burning house. The 1974 sequel Frankenstein and the Monster From Hell reveals that he survived the fire, but this was originally intended to be a death before they decided to make a sequel.

The House That Dripped Blood (1971) [Philip Grayson]: Decapitated with an axe by Wolfe Morris (off-screen) in the wax museum. The scene ends with Wolfe bringing the axe down. Peter's severed is later shown on display in the museum.

Twins of Evil (1971) [Gustav Weil]: Stabbed in the back with an axe thrown by Damien Thomas. He dies after Damien pushes him off the landing. (Thanks to Garrett)

Asylum (House of Crazies) (1972) [Smith]: Accidentally shot to death when his own gun goes off during a struggle with Barry Morse. (Thanks to Garrett)

Dracula AD 1972 (1972) (Dracula Today) [Professor Van Helsing]: Playing a dual role as the 20th-century Van Helsing and his ancestor, the 19th-century Van Helsing is fatally injured when the carriage crashes during a struggle with Christopher Lee; he dies after managing to drive the wooden wheel-spoke into Christopher's heart. (The 20th-century Van Helsing survives the movie.) (Thanks to Garrett)

Tales from the Crypt (1972) [Arthur Edward Grimsdyke]: Commits suicide (off-screen) by hanging himself in his home; his body is shown (from the waist down) afterwards when the townspeople discover him. He later comes back to life as a zombie to get revenge on Robin Phillips.

From Beyond the Grave (1974) [Antique Shop Proprietor]: appears as a ghost/spirit owning a shop. We learn he's that at the end of the film.

Madhouse (Deathday; The Madhouse of Dr. Fear; The Revenge of Dr. Death) (1974) [Herbert Flay]: Killed (from falling down stairs) by Vincent Price, as Vincent finds out that peter had been killing people and framing Vincent for it. (Thanks to Garrett)

The Ghoul (1975) [Dr. Lawrence]: Commits suicide (off-screen) by shooting himself in the head after killing his son Don Henderson.

Trial by Combat (A Choice of Arms; Choice of Weapons; Dirty Knight's Work) (1976) [Sir Edward Gifford]: Stabbed to death (off-screen) with a sword by a man in medieval knight's armor. (Thanks to Garrett and Uwe)

Land of the Minotaur (1976) [Baron Corofax]: Destroyed along with his other satanists, when Donald Pleasence throws holy water around and on them and says a prayer.

Shock Waves (1977) [SS Commander]: Drowned by one of the zombies while trying to escape through the marsh. We only see him being pulled under; his body is not shown afterwards.

The Uncanny (1977) [Wilbur Gray]: Falls down a flight of stairs after being attacked by a group of cats. (Thanks to Garrett)

Star Wars Episode IV: A New Hope (Star Wars) (1977) [Grand Moff Tarkin]: Killed (off-screen) in an explosion (along with the rest of the Death Star crew) when Mark Hamill blows up the Death Star.
House of the Long Shadows (1983) [Sebastian Grisbane]: Hanged, it's later revealed that Peter was faking his death.

The Avengers: Return of the Cybernauts (1967) [Paul Beresford]: Electrocuted by a short-circuiting Cybernaut, when Patrick Macnee tries to disable the Cybernaut while it's trying to crush Peter to death. (Thanks to Garrett)

Hammer House of Horror: The Silent Scream (1980) [Martin Blueck]: Dies (off-screen) after being caught in his own inescapable trap; the episode ends with him screaming in the cell.