Highlights from the Fifteenth Episode of Season 3 of Hawaii Five-0

Five-0 investigates when a mysterious man (guest star Peter Weller, who directs this episode) targets select police officers for revenge and McGarrett is the next on his hit list. Photo: Norman Shapiro/CBS ©2012 CBS Broadcasting, Inc. All Rights Reserved.

Five-0 (Grace Park, left, Daniel Dae Kim. right) investigates when a mysterious man targets select police officers for revenge and McGarrett is the next on his hit list. Photo: Norman Shapiro/CBS ©2012 CBS Broadcasting, Inc. All Rights Reserved.

Thanks to Chris M. for the winning photo caption!

Five-0 (from left to right: Alex O’Loughlin, Scott Caan, Grace Park, Daniel Dae Kim) investigates when a mysterious man targets select police officers for revenge and McGarrett is the next on his hit list. Photo: Norman Shapiro/CBS ©2012 CBS Broadcasting, Inc. All Rights Reserved.

Five-0 (Grace Park, left, Daniel Dae Kim. right) investigates when a mysterious man targets select police officers for revenge and McGarrett is the next on his hit list. Photo: Norman Shapiro/CBS ©2012 CBS Broadcasting, Inc. All Rights Reserved.

Five-0 (from left to right: Alex O’Loughlin, Scott Caan, Daniel Dae Kim, Grace Park) investigates when a mysterious man targets select police officers for revenge and McGarrett is the next on his hit list. Photo: Norman Shapiro/CBS ©2012 CBS Broadcasting, Inc. All Rights Reserved.

Five-0 (from left to right: Alex O’Loughlin, Scott Caan, Daniel Dae Kim) investigates when a mysterious man targets select police officers for revenge and McGarrett is the next on his hit list. Photo: Norman Shapiro/CBS ©2012 CBS Broadcasting, Inc. All Rights Reserved.

Five-0 investigates when a mysterious man (guest star Peter Weller, who directs this episode) targets select police officers for revenge and McGarrett is the next on his hit list. Photo: Norman Shapiro/CBS ©2012 CBS Broadcasting, Inc. All Rights Reserved.

Five-0 (Alex O’Loughlin, left, Scott Caan, right) investigates when a mysterious man targets select police officers for revenge and McGarrett is the next on his hit list. Photo: Norman Shapiro/CBS ©2013 CBS Broadcasting, Inc. All Rights Reserved.

Five-0 (Alex O’Loughlin, left, Scott Caan, right) investigates when a mysterious man targets select police officers for revenge and McGarrett is the next on his hit list. Photo: Norman Shapiro/CBS ©2013 CBS Broadcasting, Inc. All Rights Reserved.