Ultraseven: S1 E5 - Vanished Time
World famous scientist Professor Yushima came to Japan, on a trip to attach the Yushima Diode to the TDF Far East Base. However, Professor Yushima has already been brainwashed by Alien Vira! Dan noticed the fact earlier than anyone else, but nobody believed in him. Instead, Dan was retrained. Who will help Earth out of the danger?