The Body Disappears(1941)

Now You See Him! Now You Don't!

Wealthy scion Peter DeHaven, about to marry socialite Christine Lunceford, wakes up after bachelor party revelry to find he's been turned invisible by eccentric college professor Reginald Shotesbury. An unbelievable series of events is revealed by several witnesses testifying in a "mystery trial" to determine the reason for DeHaven's "disappearance".