Castle is broadcast on Monday nights at 10:00 pm on the ABC network. I tried to include a link to the ABC website, but it rejects my Linux OS. Starring Nathan Fillion and Stana Katic, (her own website) it is both a romantic comedy and murder mystery all-in-one. Both actors are Canadian. So at this moment I can count 5 or more Canadian actors who are (probably) living & working in Hollywood. That is somewhat a surprise, and a pleasant one.