Regular Show: The Movie (2015)

In the distant future, Rigby leads Benson, Skips, Hi-Five Ghost, Muscle Man, and Pops against a madman named Mr. Ross, who is plotting to destroy Earth by erasing all of time. They find Mr. Ross’ weapon is guarded by a cyborg version of Mordecai, who attempts to kill Rigby for a transgression he did in the past. When the entire team is killed, Benson sacrifices himself so that Rigby can use a timeship, a space vehicle that can travel through time, to reach the past and stop the chaos. Rigby does so, but not before Mordecai shoots him with a plasma shotgun.

In the present, Mordecai and Rigby barely convince Benson not to fire them after running late due to Rigby’s idea to get breakfast burritos. When the timeship crash lands in the park, future Rigby appears to tell Mordecai, Rigby and their co-workers that when Mordecai and Rigby were in high school, they created a time machine that backfired and created a “Time-nado”, a tornado with the ability to travel through space and time, which was harnessed and weaponized by their former science teacher and volleyball coach, Mr. Ross, who was held responsible for the incident and sent to prison. Before dying, future Rigby also reveals future Mordecai shot him (to the shock of the group as they do not believe it is possible) and says Rigby must soon reveal a secret from his past in order to save the universe, even if it costs him his friendship with Mordecai.