A classic episode that was done in the Fleisher cartoons of Superman, the Adventures of Superman with George Reeves and Superboy. Falling back to earth Superman has amnesia. (Notice the sign he smashes through) He is found in a crater he created by his fall by a homeless man and is taken to the police station where Inspector Henderson calls Lois Lane. Lois comes to the station but Clark doesn't know who she is. Turns out the asteroid wasn't destroyed and must still be stopped but no one can find Superman.
Some funny scenes with Cat Grant taking advantage of Clark's amnesia and Martha and John Kent trying to make Clark remember who he is as when taking a baseball bat, "This is going to hurt me more than it is you," and breaking it on Clark and when Johm and Martha push him off the top floor to make him fly. He doesn't. He falls into trash where Lois finds him.
What brings back his memory is talking to Lois about Superman. Eventually Superman pushes the asteroid off course and the world is saved. A great episode worthy of the classic George Reeves Panic in the Sky.