The Castle episode , which first aired on January 3, 2011, centers on actress Natalie Rhodes shadowing Detective Kate Beckett to prepare for her role as Nikki Heat in the film adaptation of Castle's novel, Heat Wave . Plot Summary
: The team investigates the death of Stacy Collins, a high-end matchmaker found impaled on a fence. They discover Stacy was secretly running "honey traps," using an escort to catch unfaithful husbands so their wives could secure better divorce settlements. [S3E11] Nikki Heat
Fans often note that the episode aired out of its intended chronological sequence; Castle is still in a relationship with Gina here, even though they break up in the subsequent episode, "Poof, You're Dead". The Castle episode , which first aired on