NBC’S hit series Chicago Fire, Chicago P.D. and Chicago Med are uniting as “One Chicago” in a major three-hour television event beginning at 8 p.m. EST. The “crossover” episode will feature all three casts as they battle a weaponized, flesh-eating bacteria that has invaded the windy city during a tail-gating party at Soldier Field.

My arts and entertainment show—UPFRONT—was invited to NBC’s One Chicago Press Day last week where I interviewed cast members about tonight’s historic event.

Chicago P.D. star LaRoyce Hawkins talks about his excitement over the episode while Chicago Med stars S. Epatha Merkerson and Oliver Platt talk about the unpredictability of filming such a huge production. Writer and producer Derek Haas also opens up about the creative writing process of a “crossover” episode and working closely with series creator and TV icon Dick Wolf.

In addition to the interviews, I also participated in set demonstrations where I helped save a life from a burning apartment with Chicago Fire, solve a murder mystery with Chicago P.D. and assist in the emergency room with Chicago Med.

Check out UPFRONT below + photos + the exciting “CrossOver” trailer: