Part 1: Déjà vu
"Do we know what causes déjà vu?" asks Floyd Kitchen from Queenstown in New Zealand.
Drs Rutherford and Fry investigate this familiar feeling by speaking to world-leading reseacher Chris Moulin from the University of Grenoble in France and memory expert Catherine Loveday from Westminster University. Plus, they find out why early investigations classed déjà vu as a type of paranormal phenomenon.
For most of us, it's a fleetingly strange experience, but for some people it can become a serious problem. Lisa from Hulme in Manchester started experiencing déjà vu when she was 22 with episodes that could last all day. The origin of her déjà vu has been the key to helping psychologists investigate its cause.
Part 2: Randomness
"Is anything truly random, or is everything predetermined?" asks Darren Spalding from Market Harborough.
Hannah and Adam go in search of random events, from dice throws to lava lamps. Can we predict the outcome of any event?
"How do computers mana