With his recent appearance on Doctor Who, Mark Sheppard cemented his place as science fiction's greatest character actor. But we've been loving Sheppard for years...and we assembled this video of every last one of his scifi roles to prove his awesomeness.

You'd be forgiven for thinking that we weren't in the middle of sweeps right now, looking at this week's TV line-up. Where's the razzle and/or the dazzle? Who's bringing the excitement? Oh, wait: House is treating a pornstar. Never mind.

It's a week unlike any other... Oh, okay, with new episodes of most of our favorite shows, it's a week very like many others. But there's also the launch of the new Prisoner, making Sunday the night to tune in.