OLTL’s Nathan Fillion in Castle or AMC’s Kelli Giddish in Chase: Which ABC Soap Alum Will You Be Watching Tonight at 10 pm? Jamey Giddens September 21, 2010 3 Comments * Chase sounds hot! I'll be watching Giddish. I always liked that Di! * Castle all the way! Come on, it's Nathan Fillion! * Neither. I'm Tivo'ing 'em!