Actor Allusion: While discussing whether Robert Pattinson was the vampire or the werewolf in "Twilight," Rafe says "Don't look at me." Graham Greene played Harry Clearwater in the Twilight movies.
Adored by the Network: Reruns are extremely frequent, new episodes are heavily promoted, and the show was renewed for a second season after only FOUR episodes (out of twelve) were aired. It probably has to do with the fact that, next to Warehouse 13, it's the only primetime show on the network that isn't a Canadian or BBC import (all except Continuum, incidentally, having already finished).
Enforced Method Acting: In "The Bride Wore Black," Nolan doesn't tell Tommy he knows Datak didn't commit the murder they're arresting him for or that the plan is for him to lead them to whoever framed him, so Tommy will be more convincing.
Fake American: Australian Grant Bowler plays an American, while Scottish Tony Curran, British Jamie Murray and Canadian Mia Kirshner all play aliens with American accents.
Mean Character, Nice Actor: Mean is certainly stretching it, but there's certainly a distinctness between Irisa and Stephanie Leonidas. In one behind the scenes interview, it's noted that she almost constantly worries about Kevin (the actor who plays the Sensoth in the show) because she keeps seeing the frown in the makeup and thus keeps thinking he's uphappy about something.