Journeyman

Journeyman airs Mondays at 10 p.m. on NBC. Kevin McKidd stars as a San Francisco journalist who is whisked off to various times in the past to change people's lives.
I was thrilled to see that Entertainment Weekly's Pop Watch blog has joined in support of this show.

There's a petition afoot to encourage NBC to renew this brilliant but neglected show. If you like Journeyman, please go to the link and sign the petition. Can't hurt, right? The network hasn't adequately promoted Journeyman, and worse yet, scheduled it opposite CSI For Dummies, er, CSI: Miami.

Before you dismiss the show as another Quantum Leap, stop right there. It actually has more in common with the X-Files. Quantum Leap was an episodic drama, meaning each show stood on its own. What's-his-face (I only watched that show once or twice) would leap into someone's life, fix their problem, and leap out. And scene.

Journeyman has a complicated, continuing mythology underlying those leaps in and out of time. The main character, Dan, is met in the past by his former fiancé Livia, whom he had presumed to be dead. She can't / won't explain exactly what's going on but she keeps showing up. Dan doesn't know why he time travels and wants it to stop. A mysterious physicist who never seems to age shows up at various points in time in various episodes - and this physicist seems to know a lot about tachyons, mysterious particles that may or may not have something to do with time travel. The guy is creepy, and he probably has something to do with Dan's traveling, but who knows? It would suck if NBC cancelled the show before this question is resolved.

There's a lot more but it would fill up pages and pages and I don't want to do that to you. If you want to read more (lots more) about Journeyman, there's an excellent discussion board at the Television Without Pity forums.