Huh... Yeah, if they only want the Doctor, letting everyone else out and telling them to go wreck stuff would be a distraction, huh? And even then, Edmond-san said even though the Nightshade are still loyal to the Doctor, the other "the" guys don't really care about getting him back. It's messed up, huh? Leaving their friend like that.

I dunno about the vampire part, though. Unless those guys were in prison too.