Dr. Volga is a professor hailing from West Germany who designed the futuristic city being built on the Tokyo Bay Waters. During a visit to the theatre, Ken bumped into the professor getting a snack. They were interrupted by a group of Jurals disguised as gangsters. After being taken away, there is a brief scuffle where Volga was shot with some type of weapon. Ken saw the incident from afar but did not think much of it.
Later it is announced that Professor Volga is arranged to meet Professor Yoshizaka and several other leaders of various nations for a reception at the space station hall later that day. Ken decided to crash the meeting to warn everyone that the Professor Volga they were speaking with was, in fact, a fake. Volga, who had no memory of the incident, told Ken to go home.
Ken used his super-hearing and determined that a time bomb has been planted in Volga's skull. Ken transformed and picked up the Professor, taking him to his Sky Rod to escape the pursuing Jurals. As the clock ticked to the time of detonation (and the end of the episode is fast approaching) Ken decided he only had one option left: eject Volga from the Sky Rod and use him to blow up the pursuing Jurals. Ken cried out "Professor Volga, forgive me!" before launching him out of the spaceship.
Source[]
Chargeman Ken! 35 "Dynamite in the Brain"