Four teams. Two games. Two tickets to the 113th Grey Cup. The Canadian Football League playoffs have already delivered enough drama to make a Hollywood screenwriter blush, and Saturday’s division finals promise more of the same. The Winnipeg Blue Bombers are attempting to become the first crossover team to reach the Grey Cup, while the Montreal Alouettes are defending an unbeaten home record. Out West, the BC Lions and Edmonton Elks are looking to end championship-game droughts stretching back to 2011 and 2015, respectively. History offers an interesting contrast. Eastern Final hosts have won just once in five years, while