"I can't say I was out there on the hunt for a new series, but this kind of came to me in a very organic way," Sinise tells TVGuide.com in the video above.
That's because the actor is pals with Criminal Minds star Joe Mantegna, who introduced him to executive producer Erica Messer two years ago. When it came time to cast International Unit Chief Jack Garrett on the globe-trotting spin-off, Messer had one person in mind.
How did Sinise react when producers asked to meet with him? Find out above.
Criminal Minds: Beyond Borders premieres Wednesday, March 16 at 10/9c on CBS.
(Full disclosure: TVGuide.com is owned by CBS.)