Gerstad's editing work spanned more than 40 films, including The Spiral Staircase (1946), Crossfire (1947), Rocketship X-M (1950), Batman (1966), The War Wagon (1967) and Walking Tall (1973).
His most notable on-screen appearances after 1930, were in Green Dolphin Street, Rocketship X-M and The Court Jester.
The next morning the scientists, clad in aviation oxygen mask
He rushed into production his film version called Rocketship X-M, released a year later in 1950; he changed the destination to Mars to avoid copying exactly the same idea being utilized by producer George Pal in his large budget, high-profile Destination Moon.