In one of the last episodes, "The Perils of Superman" (a takeoff on "The Perils of Pauline"), there was indeed deadly peril straight out of the movie serials: Lois was tied to a set of railroad tracks with a speeding train bearing down on her, Perry White was nearly sawn in half while tied to a log, Jimmy was in a runaway car headed for a cliff, and Clark Kent was immersed in a vat of acid.