Here are the TV ratings for the Castle series. Mystery novelist Richard Castle (Nathan Fillion) both aids and annoys NYPD Detective Kate Beckett (Stana Katic) and her team as they investigate crimes. The fourth season of Castle typically airs Monday nights at 10pm on the ABC network.

These are the TV show’s ratings for the 2011-12 season, the best way to tell if Castle is going to be cancelled or renewed for season five. Check out our ABC ratings report card to see how this show’s numbers compare with the others on the network.

These figures will be updated as the weeks progress so be sure to bookmark and return to this page:

Season four final averages: 2.3 rating in the 18-49 demographic with 10.71 million total viewers.

Episode 04-23: Monday, 05/07/12
2.4 in the demo (+4% episode-to-episode change) with 12.36 million; first in the timeslot.
Season average: 2.33 in the demo with 10.71 million.
Demo average rank: #12 of 22 scripted TV shows on the network (Fall 2011 – Spring 2012).

Episode 04-22: Monday, 04/30/12
2.3 in the demo (+10% episode-to-episode change) with 11.08 million; second in the timeslot.
Season average: 2.32 in the demo with 10.64 million.
Demo average rank: #12 of 22 scripted TV shows on the network (Fall 2011 – Spring 2012).

Episode 04-21: Monday, 04/16/12
2.1 in the demo (0% episode-to-episode change) with 11.23 million; first in the timeslot.
Season average: 2.32 in the demo with 10.62 million.
Demo average rank: #12 of 22 scripted TV shows on the network (Fall 2011 – Spring 2012).

Episode 04-20: Monday, 04/02/12
2.1 in the demo (-9% episode-to-episode change) with 11.69 million; tied for second in the timeslot.
Season average: 2.34 in the demo with 10.59 million.
Demo average rank: #11 of 20 scripted TV shows on the network (Fall 2011 – Spring 2012).

Episode 04-19: Monday, 03/26/12
2.3 in the demo (0% episode-to-episode change) with 11.87 million; first in the timeslot.
Season average: 2.35 in the demo with 10.53 million.
Demo average rank: #11 of 20 scripted TV shows on the network (Fall 2011 – Spring 2012).

Episode 04-18: Monday, 03/19/12
2.3 in the demo (+10% episode-to-episode change) with 11.52 million; second in the timeslot.
Season average: 2.35 in the demo with 10.45 million.
Demo average rank: #11 of 20 scripted TV shows on the network (Fall 2011 – Spring 2012).

Episode 04-17: Monday, 02/27/12
2.1 in the demo (0% episode-to-episode change) with 9.10 million; third in the timeslot.
Season average: 2.35 in the demo with 10.39 million.
Demo average rank: #11 of 18 scripted TV shows on the network (Fall 2011 – Spring 2012).

Episode 04-16: Monday, 02/20/12
2.1 in the demo (+5% episode-to-episode change) with 9.73 million; third in the timeslot.
Season average: 2.37 in the demo with 10.47 million.
Demo average rank: #11 of 18 scripted TV shows on the network (Fall 2011 – Spring 2012).

Episode 04-15: Monday, 02/13/12
2.0 in the demo (0% episode-to-episode change) with 8.86 million; third in the timeslot.
Season average: 2.39 in the demo with 10.52 million.
Demo average rank: #12 of 17 scripted TV shows on the network (Fall 2011 – Spring 2012).

Episode 04-14: Monday, 02/06/12
2.0 in the demo (-5% episode-to-episode change) with 8.70 million; third in the timeslot.
Season average: 2.41 in the demo with 10.64 million.
Demo average rank: #11 of 16 scripted TV shows on the network (Fall 2011 – Spring 2012).

Episode 04-13: Monday, 01/23/12
2.1 in the demo (-5% episode-to-episode change) with 10.05 million; first in the timeslot.
Season average: 2.45 in the demo with 10.79 million.
Demo average rank: #11 of 16 scripted TV shows on the network (Fall 2011 – Spring 2012).

Episode 04-12: Monday, 01/16/12
2.2 in the demo (-4% episode-to-episode change) with 9.41 million; second in the timeslot.
Season average: 2.48 in the demo with 10.85 million.
Demo average rank: #11 of 16 scripted TV shows on the network (Fall 2011 – Spring 2012).

Episode 04-11: Monday, 01/09/12
2.3 in the demo (+15% episode-to-episode change) with 9.76 million; first in the timeslot.
Season average: 2.50 in the demo with 10.98 million.
Demo average rank: #11 of 16 scripted TV shows on the network (Fall 2011 – Spring 2012).

Episode 04-10: Monday, 12/05/11
2.0 in the demo (-13% episode-to-episode change) with 8.12 million; second in the timeslot.
Season average: 2.52 in the demo with 11.10 million.
Demo average rank: #10 of 15 scripted TV shows on the network (Fall 2011 – Spring 2012).

Episode 04-09: Monday, 11/21/11
2.3 in the demo (-4% episode-to-episode change) with 10.85 million; second in the timeslot.
Season average: 2.58 in the demo with 11.43 million.
Demo average rank: #10 of 15 scripted TV shows on the network (Fall 2011 – Spring 2012).

Episode 04-08: Monday, 11/07/11
2.4 in the demo (-11% episode-to-episode change) with 11.07 million; second in the timeslot.
Season average: 2.61 in the demo with 11.51 million.
Demo average rank: #10 of 15 scripted TV shows on the network (Fall 2011 – Spring 2012).

Episode 04-07: Monday, 10/31/11
2.7 in the demo (+13% episode-to-episode change) with 12.58 million; second in the timeslot.
Season average: 2.64 in the demo with 11.57 million.
Demo average rank: #10 of 15 scripted TV shows on the network (Fall 2011 – Spring 2012).

Episode 04-06: Monday, 10/24/11
2.4 in the demo (-4% episode-to-episode change) with 10.8 million; third in the timeslot.
Season average: 2.63 in the demo with 11.40 million.
Demo average rank: #10 of 14 scripted TV shows on the network (Fall 2011 – Spring 2012).

Episode 04-05: Monday, 10/17/11
2.5 in the demo (+19% episode-to-episode change) with 11.23 million; second in the timeslot.
Demo average rank: #9 of 13 scripted TV shows on the network (Fall 2011 – Spring 2012).
Season average: 2.7 in the demo with 11.52 million.

Episode 04-04: Monday, 10/10/11
2.1 in the demo (-16% episode-to-episode change) with 10.23 million; third in the timeslot (House on FOX was delayed until 10pm and was in second place.)
Demo average rank: #8 of 19 scripted TV shows on the network (Fall 2011 – Spring 2012).
Season average: 2.7 in the demo with 11.59 million.

Episode 04-03: Monday, 10/3/11
2.5 in the demo (-19% episode-to-episode change) with 11.18 million. It was second in the timeslot, beaten by Hawaii Five-0.
Current demo rank: #9 of 12 scripted TV shows on the network (Fall 2011 – Spring 2012).
Season average: 2.9 in the demo with 12.04 million.

Episode 04-02: Monday, 9/26/11
Episode two was down slightly to a 3.1 in the demographic and 11.67 million viewers. It was in second place for the timeslot and outperformed last year’s episode by 10%. One wonders how much better the show would be doing if Dancing with the Stars was having a better season.
Season average: 3.2 demo with 12.48 million.

Episode 04-01: Monday, 9/19/11
The drama had a healthy kick-off to the season with a 3.2 rating in the 18-49 demographic and 13.28 million viewers. Year-to-year, it was up by 19% in the demo (2.7) and 24% in total viewership (10.70 million). It was a close second to the premiere of Hawaii Five-0 on CBS which likely got a boost from the return of Two and a Half Men. This was Castle’s best season premiere and nearly matched the show’s series high record (a 3.3 rating for the season three finale).

Reference point: The 2010-11 season averaged a 2.7 rating in the 18-49 demographic and 10.67 million viewers.

Note: These ratings are collected by the Nielsen company and are the final national numbers. These are different from the fast affiliate numbers which are just estimates of the actual ratings and are reported on by most other outlets. The final nationals are typically released within 24 hours of the programming or, in the case of weekends and holidays, a couple days later.

What do you think? Do you like the Castle TV series? Do you think it should be cancelled or renewed for a fifth season?

Image courtesy ABC.