Episode Title:The Search for Splinter, Part 1.Episode Description:After a frustrating and exhaustive search for Splinter, the Turtles' suspicions turn towards the Guardians. This suspicion leads them to an austere building with the company name TCRI – the same name on the canister of ooze responsible for their mutation. Following their only lead, the Turtles enlist April and Casey to help them get inside.