First up, Burn Witch Burn!
No trailer for that one (or DVD release, it seems), but here's part 1 of the movie itself!
Next, up, the movie serial Buck Rogers in the 25th Century!
While this isn't the same movie, I thought this was interesting enough to post here... a 1935 Buck Rogers 10-minute short!
And our third feature, Caltiki, The Immortal Monster! Here's the trailer: