|Continuity||Rise of the Planet of the Apes|
| First Appearance: Rise of the Planet of the Apes
Last Appearance: Rise of the Planet of the Apes
Buck was a powerful gorilla housed in a specially-built cage at the San Bruno Primate Shelter. He was the only ape never harassed by Dodge Landon. He was ill-tempered, strong and brave, and was seen trying to get out and banging his cage. He was freed by Caesar and at first refused to go out, but after a few seconds Buck quickly dashed through the play area and begin playing with the toys the other apes played with. He respected Caesar and became his friend and his "muscle", even helping Caesar to make Rocket respect him.
After the ape uprising at the facility, Buck was ordered by Caesar, with a group of chimps, to free the apes held at the San Francisco Zoo. In the climactic battle on the Golden Gate Bridge, Buck set his target on a nearby policeman on horseback. He ran up under the horse, lifting it up and giving it a quick tickle along the belly. This caused the officer to fall off. Buck approached the policeman and prepared to kill him, but Caeser stopped him. He later led some other gorillas in a charge to push an overturned bus along the bridge, to shield them against police bullets. He also helped throw off a policeman who drove his car in reverse to the sideline of the bridge into the ocean from shooting off the apes with his pistol. As Caesar was about to get shot down by Steven Jacobs and a sharpshooter in a helicopter, Buck sacrificed his life to take down the helicopter, which crashed onto the bridge, killing the occupants, but got repeatedly shot in the process. Caesar was saddened to lose his friend and his death was avenged by letting Koba finish off Jacobs.
- Buck was named in tribute to Buck Kartalian, who played gorilla characters in both Planet of the Apes and Conquest of the Planet of the Apes, and who remains very active at Apes fan conventions to this day.
- An earlier version of the script has Buck survive the battle at Golden Gate Bridge, throwing Dodge off the bridge to his death after Dodge has killed Rocket.
- He is based on King Kong, especially being portrayed a strong and noble gorilla with a powerful advantage over human enemies. The climax where he fights the helicopter and dies from his injuries is also similar to King Kong's death. Ironically, Andy Serkis performed the 2005 incarnation of King Kong, which was also developed with the cooperation of Weta, which won an Academy Award.