Kara

Star Trek
Kara was a fictional alien and a "brain-robber" featured in the Star Trek multimedia franchise. Played by actress Marj Dusay, she appeared in the season three premiere of the original Star Trek series titled, "Spock's Brain".

Kara was a female humanoid member of an alien race known as the Eymorgs, who lived on the sixth planet in the Sigma Draconis system. In 2268 on Stardate: 5431.4., she teleported aboard the USS Enterprise and stole Mister Spock's brain. Yes... his brain!