'Castle' Season 8 Episode 15 News, Spoilers: Kate Beckett Knows About LokSat? Identity Of NYPD Academy Killer May Not Be So Secret

"Castle Season 8" Episode 15, "Fidelis Ad Mortem," will see Kate Beckett, played by "Quantum Of Solace" actress Stana Katic, and Richard Castle, played by "Serenity" actor Nathan Fillion, tested once more. This is while Kate Beckett has to find the truth about an NYPD Academy killer on the loose in "Castle Season 8" Episode 15.

Spoiler TV reports that "Castle Season 8" Episode 15 will drop Kate Beckett, Richard Castle will have to unmask the NYPD Academy killer that has been using NPYD training to kill. Will this put the protegé that Kate Beckett had been mentoring at the NYPD Academy in danger, or will "Castle Season 8" Episode 15 turn up a darker truth? Does the episode title, "Fidelis Ad Mortem" (faithful unto death), possibly point to someone sacrificing their life in "Castle Season 8" Episode 15?

Melty reports that Richard Castle possibly has a problem to face, which may be far bigger than an NYPD Academy killer in "Castle Season 8" Episode 15. With the LokSat bomb that was dropped in "Castle Season 8" Episode 14, Richard Castle will have a few things to set straight with Kate Beckett in "Castle Season 8" Episode 15.

The question, however, is whether or not "Castle Season 8" Episode 15 will drive a wedge between Kate Beckett and Richard Castle. Given the revelations of "Castle Season 8" Episode 14, can Richard Castle trust himself to handle the truth? Will Kate Beckett be handed the full truth? Has the time come for Richard Castle and Kate Beckett to go public with their relationship once more?

Get a tough lesson from Captain Beckett! https://t.co/2ynzBZRXiE pic.twitter.com/H1dlzq8XND

— Castle (@Castle_ABC) March 17, 2016

"Castle Season 8" Episode 15 will guest star "Kill Bill" actor Michael Bowen, "Frontera" actor Evan Adrian and "24" actor James Morrison.

ABC airs "Castle" every Monday evening. Nathan Fillion, Stana Katic, Tamala Jones, Jon Huertas, Seamus Denver, Molly Quinn and Susan Sullivan star in "Castle Season 8" Episode 15.