Castle
After a serial killer imitates the plots of his novels, successful mystery novelist Richard "Rick" Castle receives permission from the Mayor of New York City to tag along with an NYPD homicide investigation team for research purposes.

Season 5 · Episode 6 ·
The Final Frontier
When a body is found at a sci-fi convention, Castle and Beckett are warped into the heart of fandom -- a world of egotistic celebrities, diehard costumed fans and enough drama for two galaxies.
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Episode 6 of season 5 of Castle: “The Final Frontier”. Aired 2012-11-05. Watch it online free on ZapFlix.