When the Time Window is finally repaired, the Turtles enter into it to head home. Instead of returning to the lair, they find themselves with Viral, who had escaped from inside Serling. Viral takes control of the time portal, sending the turtles to different points in history, hoping they will be eliminated. However, Mike tricks her into taking them to the not-too-distant future where the Tengu, Utrom, and a unknown third Shredder are fighting for control with rivaling Foot Clans. The turtles meet an enemy who claims to have killed them, but manage to have Serling open a new portal in time to send them home by using the decompilier on Viral once again. However, Viral manages to muster enough control over Serling to make him fire the decompilier at Master Splinter, scattering him into data-bits while in the time stream. Upon returning to the present, Donatello blames himself for the loss of Splinter. Elsewhere, Viral attempts to recharge her energy by hacking into a heavily guarded Foot data vault. However, it backfires as a program infects her and transforms the digital being into Cyber-Shredder.