Kastlas Under the Influence (2009–2016) Online
The body of young, female DJ Holly Rhodes is found unceremoniously dumped at a construction site. The investigation indicates that she was killed elsewhere and then transported by car. The night of her death, Holly was the DJ for the album release party of aging pop star, Regina Cane, where, it's discovered Regina's party was crashed and she was upstaged by rising pop star, Josie Lang. Castle and Beckett also find Joey, a troubled teen, who was hired by Holly to assist her at DJ parties. They suspect Joey is responsible for thefts that have been occurring at the parties where Holly is the DJ. Castle and Beckett must answer the question of whether Holly was killed by troubled teen Joey or if she became caught up in the competitive drama of aging versus rising pop stars, while Detective Esposito takes Joey under his wing to steer him on the right path before it's too late.
| Episode cast overview, first billed only: | |||
 | Nathan Fillion | - | Richard Castle |
 | Stana Katic | - | Kate Beckett |
 | Susan Sullivan | - | Martha Rodgers |
 | Jon Huertas | - | Javier Esposito |
 | Seamus Dever | - | Kevin Ryan |
 | Tamala Jones | - | Lanie Parish |
 | Molly C. Quinn | - | Alexis Castle (as Molly Quinn) |
 | Penny Johnson Jerald | - | Captain Victoria Gates (credit only) |
 | Michael Irby | - | Shane Winters |
 | Nadji Jeter | - | Joey Malone (as Nadji Anthony Jeter) |
 | Taylor Cole | - | Regina Cane |
 | James Black | - | Darius Carson |
 | Ursula Burton | - | Maria Cooper |
 | Geno Monteiro | - | Tyrese Wilton |
 | Travis Wester | - | Paul Travers |
When Castle and Beckett are discussing the "rules" of a relationship with Esposito at the crime scene, and Espo sides with Castle, Beckett can be seen playfully shoving the back of Esposito's head as a high-angle shot pans out.