James Brolin guest starred once again as Rick's super spy daddy, Jackson Hunt but this time Castle may have learned more than he wanted to about his long lost father in Castle Season 6 Episode 12.
When a hacker is shot to death and the body moved, Anderson Cross quickly emerges as a suspect. Only Castle's the only one who knows that Cross is actual his CIA operative father.
But when Beckett uncovers that Hunt may have actually gone rogue, and murdered three people to escape, Rick isn't sure what to do...until Jackson ends up on his doorstep with a bullet wound. Then Castle tells Beckett everything and the two work together to help stop a CIA mole.
If you missed even a minute or just want to see it again, you can watch Castle online right here at TV Fanatic.