Zack's best friend; the two had been stealing cars together to help Zack afford basic necessities while training. Subplots & Themes
Castle brings along Alex Conrad , a rookie mystery novelist he is mentoring. Much to Castle's jealousy, Beckett takes a liking to Alex, even allowing him to shadow the investigation. [S3E21] The Dead Pool
Includes guest stars Justin Bruening (Rob Tredwyck), Brendan Hines (Alex Conrad), and Erik Palladino . Official Summary: View more on Apple TV or Rotten Tomatoes . Zack's best friend; the two had been stealing