The One Chicago franchise is brilliant. Chicago Fire, Chicago Med, and Chicago P.D. have the best integration of any current television franchise. Characters from each show regularly appear in the other two productions. The annual crossover is one of the highlights of the year. The same can be said for the annual Arrowverse crossover.

The coming Arrowverse crossover, Crisis on Infinite Earths, will feature cast members from six different shows and will span five episodes. An episode from each Supergirl, Batwoman, The Flash, Arrow, and Legends of Tomorrow. The title character from Black Lightning will make an appearance at some point in the crossover.