The Ultraman: S1 E46 - The Remote-Control Monster The Ultraman
Tobe and Marume create a communication device that emits a special radio wave that only Ultraman can perceive. It seems as though this will cause Hikari's secret to be exposed. Hikari rescues Mutsumi, who is seriously injured in a battle with Mecha Monster Gedon, but then he transforms to fight and stop Gedon's onslaught. The other members sharply criticize Hikari for taking his eyes off Mutsumi.