Teenage Mutant Ninja Turtles (1987)

S04E23 Donatello Makes Time

Title: Donatello's Temporal Experiment Plot: The eccentric Professor Lloyd Cycloyd, having fled from a mental facility, stumbles upon the Turtles' hidden lair. Intrigued, he witnesses Donatello experimenting with a groundbreaking device he created: a time-stopping mechanism.