Will Jodi Lyn O'Keefe Be Castle's First Big Test?

Prison Break bad girl Jodi Lyn O’Keefe will want to do very bad things with Rick when she guest-stars on ABC’s Castle this fall.

O’Keefe will appear in one of Season 5’s early episodes as a TV entertainment reporter who wouldn’t be opposed to securing a “sexclusive” of some sort with Beckett’s partner in crime-solving. The Hollywood Reporter first reported on the casting.

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O’Keefe’s character, depending on how intently she makes a play for the mystery novelist, could present a first “test” of sorts for Castle and Beckett, who enter the new season romantically (if secretly) involved with one another.

As series creator Andrew Marlowe reminds, “In the pilot, [Kate] said [to Rick], ‘What, so I can be another notch on your bedpost? I know you — you have a reputation as being a womanizer.’ So what happens when you’re the woman who finally beds the womanizer? How far do you trust that? When is it real?”

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In addition to her Prison Break stint, O’Keefe’s TV credits include a recurring run on Two and a Half Men, episodes of Lost, The Big Bang Theory and Boston Legal, and, of course, Nash Bridges.

Castle returns Monday, Sept. 24 at 10/9c. O’Keefe’s episode, “Cloudy With a Chance of Murder,” is scheduled to air Oct. 1, an ABC rep confirms.