'Castle' sneak peek: Spy dad returns! | EW.com

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'Castle' sneak peek: Dad issues -- EXCLUSIVE

There’s something strange afoot on Monday’s Castle – and it involves Castle’s father!

In this exclusive sneak peek from next week’s new episode, we see the return of James Brolin as spy daddy, who you’ll recall made a swift exit at the end of last season’s “Hunt.”

But this reappearance is anything but straightforward. In fact, the clip below will show you that he’s far from eager to make his real identity known:

Castle airs Monday at 10 p.m. ET on ABC.