"Vampire den?" Ro asks, doing his best to sound like he doesn't believe it. I mean, he doesn't. But he's going less for 'that's weird' and more 'skeptical companion to be proven wrong later,' because that's what the role calls for. And he's never shied away from engaging Lyle's personal brand of eccentricity - it's fun.

He tries not to grin too much - which isn't really hard, Roland is not a terribly emotive person - when he says, "We may have to bust it up."