Teenage Mutant Ninja Turtles: The Turtles discover the source of the Mouser robots that trashed their old lair: Dr. Baxter Stockman — a noted technological genius/inventor, who tries to pass off the Mousers as a means to eradicate the city's rat problem. Donatello gets one of the broken Mousers working and the Turtles chase it through the sewers. Meanwhile, Stockman's lab assistant April O'Neil uncovers a secret subterranean facility where hundreds of Mousers are being manufactured and stored for some nefarious purpose. Stockman catches April and sics his Mousers on her. April escapes to the sewers, where she is rescued by the Turtles, who battle the Mousers. But once April gets a clear look at her four saviors, she faints dead away.