The film is notable for being the first filmed appearance of Batman, and for debuting story details that became permanent parts of the Batman mythos. It introduced "The Bat's Cave", and its secret entrance through a grandfather clock inside Wayne Manor. Both departures subsequently appeared in the comics. The serial also changed the course of how Alfred Pennyworth's physical appearance would be depicted in later Batman works. At the time it was released in theaters, Alfred was overweight in Batman comics. After William Austin's portrayal in these chapter plays, subsequent issues of the comics portrayed him as Austin had: trim, and sporting a thin mustache. The serial was commercially successful, and spawned another, Batman and Robin, in 1949. It was re-released in 1965. The re-released ver