“Hell to Pay” – When an axe-wielding, escaped psychiatric inmate drops dead in Castle’s P.I. office, Castle and Beckett’s investigation leads Castle to suspect the victim’s death could be the work of the Antichrist.
Beckett and the 12th Precinct look into the murder of an English as a Second Langue student. But when the victim's class won't talk to the police, Castle goes undercover as a French Canadian immigrant and learns that the victim was more than he seemed.
After a movie star turned theater actor is mysteriously killed, Castle and Beckett go backstage and learn the star had more to worry about than just his lines.
Castle returns with Beckett and the team heading back to the NYPD Academy after a recruit is murdered in "Fidelis Ad Mortem."
Castle's downward trend continues with a 1.2 in the early numbers, which is unlikely to change upward because of a pre-emption in Indianapolis.
Castle bounces back from series lows to hit season average of 1.1 with "The Blame Game."
ABC's Castle improved its ratings over last season's premiere and finale with 11.46 million viewers.
Grade "What Lies Beneath"
Castle was a solid second behind The Blacklist. Finishing at 2.0 in the 18-49 demo and just under ten million viewers at 9.9, shows that the show hasn’t lost much of its audience from last year.
Castle's strong performance against the Olympics proves why it's ABC strongest show.