Star Trek: 30 Greatest Ever Villains
25. The Caretaker
A seemingly omnipotent being from the Delta Quadrant, this alien abducted many ships in the hopes of finding a compatible mate so that he could reproduce.
The powerful creature was protecting a different civilisation, but the course of action that it took wrought havoc on thousands, leaving Voyager stranded in the Delta Quadrant, along with many other ships.