Prince William & Catherine: A Royal Love Story (8pm, OWN) - A two-part report on Prince William and Kate Middleton's romance begins with her first notice of him as a secondary-school student. They actually met at the University of St. Andrews in Scotland, where they were friends before they dated.
Being Human (UK) (9pm, BBC America) - Herrick pits George against Mitchell in the Season 3 finale, and Nina's fate hangs in the balance while Annie battles Lia for Nina's soul.
Death of a Sea Monster (9pm, National Geographic Channel) - Archaeologists examine the fossilized remains of huge marine predators from the Jurassic era, including a complete ichthyosaur skeleton on a large island in the Arctic. Not a documentary about the passing of Sigmund.
Ferocious Planet (9pm, Syfy) - An experimental device malfunctions, transporting a group of observers to another dimension. The group must repair the machine in order to return home, while fending off bloodthirsty creatures.
Colin Quinn: Long Story Short (10pm, HBO) - Colin Quinn's acclaimed one-man Broadway show in which he relates the history of the world by juxtaposing historic events and more modern times. Read more.
Saturday Night Live (11:29pm, NBC) - British actress Helen Mirren is the host and the musical guest is the Foo Fighters.