Malcolm “Mal” Reynolds was a character on the TV Show Firefly. According to this Reward Dead or Alive Captain Mal T Shirt. He was wanted dead or alive in the show. He’s an outlaw and a bandit and you can celebrate his free spirit with this shirt from Snorg Tees.
Heck, celebrate the shooting star of a show that Firefly was. Why do all the good shows get cancelled?
Here’s a good clip about Mal being a Space Cowboy for Halloween.