Teenage Mutant Ninja Turtles (2003): Season 1, Episode 7

1 - 7: The Way of Invisibility

After Casey Jones makes himself an unwanted guest in the Turtles' lair, Raphael takes him topside for a "breath of fresh air," where they encounter the Foot Tech Ninjas - enhanced soldiers able to turn themselves invisible. Raph is caught and interrogated, but Casey manages to slip away and warn the others. Raph escapes his captors but, unbeknownst to him, is tailed by a squad of cloaked Foot Tech Ninjas. Will Casey and the others get to Raph in time before he leads the Foot directly to the Turtles' lair?