Actress Robin Tunney talks about the final season of the CBS drama series “The Mentalist” on the Late Show with David Letterman, Tuesday Feb. 3, 2015 on the CBS Television Network. Photo: Jeffrey R. Staab/CBS ©2015 CBS Broadcasting Inc. All Rights Reserved

Robin Tunney On The Late Show With David Letterman

Actress Robin Tunney talks about the final season of the CBS drama series “The Mentalist” on the Late Show with David Letterman, Tuesday Feb. 3, 2015 on the CBS Television Network. Photo: Jeffrey R. Staab/CBS ©2015 CBS Broadcasting Inc. All Rights Reserved

Actress Robin Tunney talks about the final season of the CBS drama series “The Mentalist” on the Late Show with David Letterman, Tuesday Feb. 3, 2015 on the CBS Television Network. Photo: Jeffrey R. Staab/CBS ©2015 CBS Broadcasting Inc. All Rights Reserved