Kruge

Kruge was a villain of the Star Trek universe and the main antagonist in Star Trek III: The Search for Spock, who commanded a Klingon Bird of Prey in the late 23rd century. His female friend was a Klingon spy named Valkris.

In 2285 Kruge obtained data on Project Genesis from Valkris. After learning that she had seen the data, he had her killed by destroying her ship. He then traveled to the planet that had been created after Khan Noonien Singh detonated the Genesis torpedo in the Mutara Nebula. Upon arrival he found the Federation science ship Grissom in orbit over Genesis. He ordered his crew to disable the ship, however the gunner's shot destroyed Grissom. Enraged, Kruge vaporized the hapless gunner with his disruptor, then called the guy an animal.

Learning that there were survivors on the surface of Genesis, Kruge led a team to the planet surface to find the survivors. Taking the survivors - Saavik, David Marcus, and the regenerated body of Spock - prisoner, he threatened to torture the information out of the prisoners. However the Enterprise arrived at that time, and Kruge beamed up to take care of that threat. Because the Enterprise was so undermanned and running on automation, Kruge was able to disable the Federation ship.

Admiral Kirk attempted to bluff the Klingons into surrendering, but that failed. Kruge ordered his crew on the surface to kill a prisoner, the Klingon warrior was going to kill Saavik before David intervened. David died fighting the Klingon, Saavik informed Kirk that his son was dead.

Kruge sent a team over to the Enterprise but before abandoning ship Admiral Kirk had set the ship to self-destruct. Kruge could only watch as powerful charges on the Enterprise reduced it to a lifeless hulk, which then burned up in the atmosphere of Genesis.

Kruge then beamed down to Genesis to confront Kirk directly. The two engaged in physical combat while Genesis broke up beneath their feet. Kruge and Kirk fought to the edge of a cliff and wound up on a ledge overlooking a lake of lava. A piece of ground gave way underneath Kruge. Kruge wound up holding on to the edge of the cliff for his life. Despite everything that Kruge had done, Kirk tried to pull the man up, but Kruge was determined to take Kirk with him. Having had enough, Kirk kicked Kruge in the head until the man lost his grip and fell to his death.

Kirk got the sole Klingon remaining on Kruge's ship to beam him and Spock's body up. The crew rushed to Vulcan, where Spock's body and katra were successfully reunited with each other.