"Journeyman" The Legend of Dylan McCleen (TV Episode 2007) - Kevin McKidd as Dan Vasser

Elliot Langley : The rules haven't changed much since Einstein. Ultimately Whether it's wormholes or warp drives, time travel requires you to go 186,000 miles per second.

Dan Vasser : The speed of light.

Elliot Langley : That's the rub because, so far, nothing has demonstrated an ability to do that.

Dan Vasser : What about tachyons?

Elliot Langley : Theoretical particles never proven to exist.

Dan Vasser : So, time travel's impossible.

Elliot Langley : No, just not proven. Five hundred years ago, we knew Pluto didn't exist. Five years ago, we knew it was a planet. Now, we know it's not. Did Pluto change? No. Did our understanding of Pluto? Yes.
Dan Vasser : Imagine. Uncovering the identity of Dylan McCleen.

Katie Vasser : Sounds like you're enjoying yourself.

Dan Vasser : It has its adrenaline moments, that's all.

Katie Vasser : And the Livia part?

Dan Vasser : No.

Katie Vasser : You're an adrenaline guy, Dan. You liked the action when you were gambling. Maybe you want two women in different time zones.

Dan Vasser : Katie...

Katie Vasser : No, I mean, you know, technically, it wouldn't be cheating if it's in the past. I was sleeping with Jack, maybe you should sleep with Livia back there.

Dan Vasser : So, if I'm with Livia back there, you can start sleeping with Jack here? What, not funny?
Capt. John Richie : Do you know where we are?

Dan Vasser : I don't know when we are.

Kevin McKidd: Dan Vasser