About a year later, Ioan Gruffudd began starring in Forever (2014). The series obliquely mirrors Castle and Beckett's partnership in the sense that his character, a civilian, partners with a homicide detective to investigate murders in New York.
Aware of Castle's jealousy, Beckett refuses to let him turn her investigation into a competition with Vaughn. He's previously done just such a thing with her exes Will Sorensen in "Little Girl Lost (2009)" and Tom Demming in "Overkill (2010)".
A squab is a baby pigeon.
The title is an echo of Ioan Gruffudd's 1999 Hornblower episode "The Frogs and the Lobsters".