12x27 Fighting Spirit

Tommy informs the Rangers of an experiment that he hopes will restore him to normal. A hesitant Hayley activates a machine that draws power from his Dino Gem and manages to make Tommy visible again, but unfortunately Dr. Oliver is left comatose. Meanwhile, as the Rangers are stripped of their powers by a new White Terrorsaurus, the hospitalized Tommy finds himself in a strange dream-world where he must fight three of his past Ranger alter-ego's in a battle for his life. This episode – rather appropriately – aired on the eleventh anniversary of the first episode of Mighty Morphin' Power Rangers.