Four hosts - one subject - no script. A comedy chat show where in this episode, the subject of "Stonehenge" is picked for investigation. What does it mean? How was it built?

Four hosts - one subject - no script. A comedy chat show where in this episode, the subject of "Magic" is plucked for investigation. Does Russell like Magic? How’s it done?

Four hosts - one subject - no script. A comedy chat show where in this episode, the subject of "Pyramids" is plucked for investigation. How were they built, and why?