Chances are, Harry Treadaway fans—meaning, those who've seen and liked him in British films like Control and Fish Tank—anticipated a Hollywood breakthrough last year, when the young English actor landed a plum role in The Lone Ranger. But, yeah, that didn't work out so well for anyone involved.

At this year's SXSW, though, Treadaway bounced back in grand fashion with standout roles in two of the festival's splashiest genre project premieres. Initially beneath most attendees' radars, the sci-fi/horror breakout film Honeymoon showed that Treadaway has sufficient leading man abilities, impressively balancing vulnerability with chilling paranoia as a husband trying to figure out why his wife's acting unlike herself.

That on-screen duality was also present in Showtime's Penny Dreadful, the pilot for which was unveiled in Austin and gave audience members a good sense of what Treadaway will bring to the key role of Dr. Victor Frankenstein. -Matt Barone