As of Sep. 21, 2015, 152 episodes of Castle have appeared on ABC across eight seasons. Episode 152, the first episode of Season Eight, aired on Sep. 21, 2015. The eighth season is scheduled to have 22 episodes.
Castle is an ABC crime drama series revolving around best-selling mystery novelist, Richard Castle, and New York Police Department homicide detective, Kate Beckett. The show, created by Andrew W. Marlowe, premiered on March 9, 2009. Nathan Fillion plays the title character of Castle, and Stana Katic plays the role of Beckett. Susan Sullivan, Molly Quinn, Jon Huertas, Tamala Jones and Seamus Dever appear as supporting characters.