Fans of Castle enjoyed the recent appearance of Rick's ex-wife on the show.

But they shouldn't count on another Helen sighting any time soon.

TV Guide reports that actress Darby Stanchfield - who has appeared on other hit shows such as Mad Men, The Mentalist and Private Practice, isn't signed on to return any time soon. She may be back at some point, however, assuming Castle earns a second season pick-up.

Rest easy, Castle: Helen won't be in your life for awhile.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.