But my absolute favorite was "Space Angel", with artwork by the great Alex Toth. It may look laughably crude now, but it was heady stuff for a 5 year old boy. Each episode was only 30 minutes but they were packed with action.

https://www.youtube.com/watch?v=_gKEt_lpjfE&list=PLKqlP-ZZ8Rv2DIRVhz37cDHXsWmnorQCu