Devon Nekoba

When a suspect threatens to release a deadly virus, the Five-0 teams up with Special Agents G. Callen (Chris O'Donnell) and Sam Hanna (LL Cool J).

McGarrett plays cat and mouse with a smart and seductive therapist he believes murdered her patient. Meanwhile, Catherine must hunt down one of Doris's old targets who is now seeking revenge. Vanessa Marcil and Carlos Bernard guest star.

When a Detroit hit man is taken out by one of his colleagues on the streets of Oahu, Five-0 is shocked to learn the killer's surprising motives. Meanwhile, Chin puts his career on the line to help Danny get the money he needs to save his brother's life.