The team turns to an old friend for help to stop a series of revenge killings on Hawaii Five-0. "Kau Pahi, Ko'u Kua. Kau Pu, Ko'u Po'o (Your Knife, My Back. My Gun, Your Head)" is the second episode of the show's eighth season.
The Five-0 team works with an injured police dog who is the only witness to an ambushed drug bust on Hawaii Five-0. "Na La 'Ilio (Dog Days)" is the third episode of the show's eighth season.
