(Ashes to Ashes) Five-0 investigates when a bomb squad is attacked and the culprit threatens to detonate additional hidden explosive devices unless arsonist Jason Sinclair is released from prison. Also, after Adam returns from the hospital, Kono realizes that they are being watched, and McGarrett prepares to take his relationship with Catherine to the next level.
Elenco: Alex O'Loughlin , Scott Caan , Chi McBride , Grace Park , Daniel Dae Kim , Masi Oka , Jorge Garcia , Ian Anthony Dale , Meaghan Rath , Beulah Koale , Dennis Chun , Kimee Balmilero , Taylor Wily , Michelle Borth , Katrina Law .