
Kane used this clipping as a guide, adding a study, crime lab, workshop, hangar and garage. Finger included with his script a clipping from Popular Mechanics that featured a detailed cross section of underground hangars.

The entrance was via a secret passage through a grandfather clock and included bats flying around.īob Kane, who was on the movie set, mentioned this to Bill Finger who was going to be the initial scripter on the Batman daily newspaper strip. Later, in Batman #12 (August–September 1942), Bill Finger mentioned "secret underground hangars." In 1943, the writers of the first Batman movie serial, titled Batman, gave Batman a complete underground crime lab and introduced it in the second chapter entitled "The Bat's Cave". Originally, there was only a secret tunnel that ran underground between Wayne Manor and a dusty old barn where the Batmobile was kept.
