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]: Seemingly executed (off-screen) by the guilotine. The films ends as the blade drops. However, the sequel, The Revenge of Frankenstein (1958), reveals that he escaped just before his execution and put someone else in his place, but the filmmakers did originally intend for this to be an actual death, so I'll list it.
The Revenge of Frankenstein (1958) [Baron Victor Frankenstein]: Beaten up by his patients in the hospital after they discover his true identity. He dies in his lab when Francis Matthews tries to save him. He is brought back to life when Francis transplants Peter's brain (under Peter's instructions) into a body that strongly resembles him (that Peter had prepared earlier on).

Sword of Sherwood Forest (1960) [Sheriff of Nottingham]: Stabbed to death 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 to death when Milton Reid fires at Michael Ripper, and Peter throws himself in front of Michael. (Thanks to Garrett and Uwe)
The Evil of Frankenstein (1964) [Baron Victor Frankenstein]: Possibly killed (off-screen) in an explosion in his castle along with his monster after his monster accidently sets his lab on fire. Although he did continue to play the role in later films, none of them share any continuity with this film, so it's likely an actual death.
The Gorgon (1964) [Dr. Namaroff]: Turned to stone by the Gorgon (Prudence Hyman) in the castle after he attempts to decapitate her.

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.
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)
Frankenstein Created Woman (1967) [Baron Victor Frankenstein]: Frozen to death (off-screen) in his lab (under his instruction) by Thorley Walters and Robert Morris. His body is shown afterwards just before he is brought back to life when Thorley and Robert unfreeze him.
Torture Garden (1967) [Lancelot Canning]: Beaten to death with a candlestick by Jack Palance 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 Victor Frankenstein]: Seemingly burned to death (off-screen) along with Freddie Jones after Freddie sets the house on fire to trap Peter. However, the 1974 sequel Frankenstein and the Monster From Hell, reveals that he survived the fire, but the filmmakers did intend this as an actual death, so I'll list it.
The House That Dripped Blood (1971) [Philip Grayson]: Decapitated (off-screen) by Wolfe Morris in the wax museum. The scene ends as Wolfe brings the axe down. Peter's severed is later shown on display in the museum.
Twins of Evil (1971) [Gustav Weil]: Hacked to death with an axe and pushed over a stair banister by Damien Thomas in the castle after he attempts to decapitate Damien. (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 Lorimeer Van Helsing/Professor Lawrence Van Helsing]: Playing a dual role, Lawrence is wounded during a fight with Christopher Lee. He dies after managing to stake Christopher's heart. Lorimeer survives the film. (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 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]: Dies (off-screen) before the film begins. He appears as a ghost throughout the film, however we don't learn this until the end.

Madhouse (Deathday; The Madhouse of Dr. Fear; The Revenge of Dr. Death) (1974) [Herbert Flay]: Pushed down a flight of stairs by Vincent Price after Vincent finds out that Peter has been killing people and framing him for it. (Thanks to Garrett)

The Ghoul (1975) [Dr. Lawrence]: Commits suicide (off-screen) in his office by shooting himself after shooting his son Don Henderson (in a monsterous form) as a mercy kill. His body is shown afterwards when his maid discovers him.

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.