Superman [Clark Kent]; Lois Lane; Jimmy Olsen; The Black Knight [Perry White]; "Bull" Mathews
After Superman releases the Black Knight from a block of ice after nearly 1,000 years, the villain goes on a crime spree. When the knight wounds Superman with his magical sword, criminal "Bull" Mathews offers to buy it, but finds it was all a set-up to trap him.
When Clark and Lois are trapped on a remote island, Clark reveals his double identity to Lois and proposes marriage. But when he discovers that he can leave the island, Clark must convince Lois he faked the super-feats he performed on the island in order to get out of the engagement.