Mark Deklin to Require Danno's Help on Hawaii Five-O

Mark Deklin has nabbed a key guest-starring role on Hawaii Five-O.

The actor, most recently seen on Lone Star for all of its two episodes, will play a vital character on the February 7 installment of this CBS hit. Look for Deklin as Stan Parker, the new husband of Danno's ex-wife and stepfather to his daughter, Grace.

Described by the network as an "international businessman" with a shady past, Stan will need Danno's help on "E Malama" when his behavior places Grace and Rachel in danger.