Format
The format of each short (5 minute) episode, of which one hundred and six were produced in all, was generally an opening discussion by the professor introducing the subject. He would then take the viewer to his time machine, pull a lever and the first series of drawings and commentary related to the subject would begin. Halfway through the story, the professor would interrupt the commentary to make some humorous remark, before returning to the narrative with an invitation to "Let's see what happened next." Each episode concluded with some humorous closing sequence.
Read more about this topic: Professor Kitzel