William Shatner

Film Deaths

Incubus (1965) [Marc]: Stabbed in the stomach during a struggle with Milos Milos outside William's home. William manages to stagger into a church for sanctuary and forgiveness, where he and Allyson Ames die in each others' arms (though the movie ends before they actually die).

White Comanche (1968) [Johnny Moon/ Comanche leader]: In a duel role of twins, the Comanche leader is killed when they face off each other in a horse duel.

Big Bad Mama (1974) [William J. Baxter]: Machine-gunned by Tom Skerritt after Tom realizes that William tipped them off to the police.

Impulse (I Love to Kill; Want a Ride, Little Girl?) (1974) [Matt Stone]: Stabbed in the back by Kim Nicholas while William is trying to strangle Jennifer Bishop. (Thanks to Michael)

The Devil's Rain (1975) [Mark Preston]: Melts (along with the rest of the cultists) after he smashes a container filled with human souls, unleashing the Devil's Rain. (Thanks to Michael)

Star Trek VI: The Undiscovered Country (1991) [Captain James T. Kirk]: Vaporized with a phaser by William Morgan Sheppard. It is actually Iman disguised as Shatner, so the death scene is being included for both people. (The real "Kirk" survives the movie.)

National Lampoon's Loaded Weapon 1 (1993) [General Curtis Mortars]:Shot in the chest/shoulder by Kathy Ireland, later shot twice in the stomach and chest by Samuel L. Jackson. (Played for comic effect) (Thanks to PortsGuy)

Star Trek Generations (1994) [Captain James Tiberius Kirk]: Mortally injured in the collapse of a bridge that had been blasted with a ray-gun by Malcolm McDowell; William dies shortly afterwards while talking to Patrick Stewart. (An alternate scene was filmed in which Malcolm shoots William in the back.)

Dead Man's Island (1996) [Chase Prescott]: Commits suicide, arranging it to look like a murder. (Thanks to ND)

Land of the Free (1997) [Aiden Cardell]: Drowned in a pond by Jeff Speakman. We only see Jeff holding William under, and William's body is not shown afterwards.

Falcon Down (2001) [Major Robert Carson]: Killed along with Donald Li and the rest of the crew of his submarine when the experimental aircraft they were towing floods and pulls the submersible to its crush depth. (Thanks to Stephen)

American Psycho 2: All-American Girl (2002) [Professor Robert Starkman]: Falls out of a window when Mila Kunis approaches him after she confesses to killing Lindy Booth. (Thanks to Germboygel)

The Wild (animated; 2006) [Kazar]: Killed when Kiefer Sutherland helps cause an avalanche by letting out a loud and mighty roar when Kiefer is trying to save his friends from Shatner's crazy animal cult and while Shatner is laughing maniacally.

Batman vs. Two-Face (animated; 2017) [Two-Face/Harvey Dent]: Voicing two personalities (from the effect of a formula), his 'Harvey Dent' persona ceases when the 'Two-Face' persona 'overtakes' it. Then later the 'Two-Face' persona ceases when Batman (voiced by Adam West) forces and makes his 'Harvey Dent' persona out again, overtake it and stays that way. (I don't know if this would even count as a 'temporary' death scene, but I'll list it in case).
Devil's Revenge (2019) [character name unavailable]: Killed in an explosion after sacrificing himself to let Jason Brooks, Jackie Dallas, and AnnMarie Giaquinto escape from the devil's cave.

Thriller: The Grim Reaper (1961) [Paul Graves]: Slashed to death with a scythe by the Grim Reaper after it comes out of the painting after Elizabeth Allen locks William in a room with it.

Thriller: The Hungry Glass (1961) [Gil Thrasher]: Falls to his death when he runs through the window, while hysterically trying to join Joanna Heyes after seeing her ghost as an image in the glass.

The Fugitive: Stranger in the Mirror (1965) [Tony Burnell]: Shot in the chest by his wife (Julie Sommars) as William is about to kill David Janssen; he dies in Julie's arms.

Star Trek: What Are Little Girls Made Of? (1966) [Captain James T. Kirk / Android Kirk]: Playing a dual role as both the real "Kirk" and an android duplicate, the android is disintegrated with a phaser by Sherry Jackson, who had mistaken it for the real "Kirk", who survives the episode. (Thanks to Robert)

Star Trek: Operation -- Annihilate! (1967) [Captain James T. Kirk / George Samuel "Sam" Kirk] Playing a dual role as both "James T. Kirk" and his brother "George Samuel "Sam" Kirk", "Sam" dies (off-screen) from the stress of attempting to resist the neural parasites that had taken over the colony. His body is seen when his brother (who survives the episode) finds him dead.

The Hound of the Baskervilles (1972) [George Stapleton]: Drowned in a pool of quicksand when the hound knocks him into it. (Thanks to C.A.)

The Horror at 37,000 Feet (1973) [Paul Kovalik]: Sucked out of the airplane while fighting a demon. (Thanks to Michael)

Mannix: Search for a Whisper (1973) [Adam Langer]: Shot to death by Pat Renella. Dies shortly after shooting Phillip Pine.

Police Squad!: Revenge and Remorse (The Guilty Alibi) (1982) [Special Guest Star]: Poisoned when he drinks some poisoned wine, after dodging several bullets. (Played for comic effect.) (Thanks to Tommy)