Look away, Kate Beckett!

On the January 11 episode of Castle, Alyssa Milano guest stars.

The actress will portray a former love interest of Nathan Fillion’s title character named Kyra.

During the installment, Castle reconnects with Kyra on the latter's wedding day. Based on the photo below, sparks aren't the only things that fly between these characters: spit does, too.

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