Castle was a remarkable ABC procedural that challenged the parameters of genre with its inventive mixture of comedy and drama. Crime procedurals tend to get stale after a while, as there’s only so many “case of the week” episodes that a series can do before it becomes stale. However, Castle managed to intertwine literary fiction, fun guest stars, and a genuine respect for law enforcement to create a series that could be both hilarious and tear-inducing. Although some seasons were more rewatchable than others, Castle maintained a consistent level of quality up until its cancelation in 2016.