Alan Ritchson's hero in 'Reacher' fights a 7-foot villain in the season 3 finale. Here's what to know about season 4.

Alan Ritchson in "Reacher" season three.

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• Alan Ritchson's Jack Reacher fights a 7-foot bodyguard at the end of 'Reacher' season three.
• The season revolved around the criminal organization behind a rug merchant.
• Here's what to know about "Reacher" season four.

Jack Reacher (Alan Ritchson) finally fought Paulie (Olivier Richters), the 7-foot tall bodyguard, at the end of "Reacher" season three — showing there's plenty left in the tank for the show ahead of "Reacher" season four.