Hitman Season 1 is free on PSN. As long as you didn't download the Paris freebie level.
EDIT: If you did download the freebie level: Search for Hitman > let all the Hitman content show up on screen > click on HITMAN™ - The Complete First Season > purchase. (For some reason, clicking on HITMAN™ - The Complete First Season directly from the search bar drop down link only nabs the Paris level.)