It can only mean one thing, can’t it? Nathan Fillion knocks on a door and Summer Glau answers asking, “Well, well, well. Has the day finally come?” Fillion nods and answers, “The day has finally come.

The Rookie season 8 will feature a crossover with Dropout’s Game Changer in the March 2 episode “Fun and Games,” with cast appearances, episode details and release information ...