Claire Van Der Boom has been cast as Danno's ex-wife on Hawaii Five-0, Entertainment Weekly reports.
The Australian actress, who recently appeared in HBO's The Pacific, will play Rachel, Danno's as-yet-unseen ex, with whom Danno regularly squabbles over the phone.
As previously reported, Rachel and Danno will find something new to fight about when McGarrett asks to use her home as a command center during a stakeout.
Van Der Boom will first appear in a November episode. CBS did not immediately respond to TVGuide.com's request for comment.