Product Information of Castle Season 4 DVD Box Set
Actors: Nathan Fillion, Stana Katic, Jon Huertas, Seamus Dever, Tamala Jones
Format: Multiple Formats, Box set, Closed-captioned, Color, NTSC, Subtitled, Widescreen
Language: English (Dolby Digital 5.1)
Subtitles: English, French, Portuguese, Spanish
Region: Region 1 (U.S. and Canada only. Read more about DVD formats.)
Aspect Ratio: 1.78:1
Number of discs: 5
Studio: Buena Vista Home Entertainment
DVD Release Date: September 11, 2014
Captain Montgomery is replaced by Captain Victoria "Iron" Gates, who does not approve of Castle's presence. Although Beckett at first claims that she does not remember the events of the gunshot, she confesses to a psychologist that she does. As Castle tries to dissuade Beckett from digging deeper into the case, he himself is immersed in the process of trying to identify Beckett's shooter.
Castle and Beckett investigate the murder of an ex-con in an alley, and believe a superhero-themed vigilante is behind the murder but the case gets complicated as they find out that there is more than one person dressed up as the same comic book hero.
Castle and Beckett investigate a crime scene that involves a large pool of blood, but no victim. The victim had a cryogenics contract, triggered by an alarm which goes off when the victim's heart stops beating. Taking the bullet out would 'kill' the corpse, so the severed head remains frozen and at the cryogenics laboratory. When Ryan and Esposito find needles with the victim's brain matter on it, the case takes a turn when Lanie discovers that someone was doing procedures to the victim's head. Alexis receives news about Stanford.
Castle and Beckett investigate the murder of a young woman which was committed using Det. Ryan's old service weapon – the one that was stolen by the serial killer, 3XK. The victim's phone records reveal she had been in contact with Seth Carver, an undercover narcotics detective. When looking through old police records, Castle manages to find a link in the case which leads them to Philip Lee, the son of Clifford Lee, a notorious Chinese drug mobster.