Operation Ouch! - Series 13: 11. When You Need to Wee!

Name: Operation Ouch! - Series 13: 11. When You Need to Wee!
Description: How does the body know when it needs to wee? The doctors find out in the lab! An optical illusion turns Dr Xand’s face green in Mindbenders, and it's time to check in on the Ouchers.

How does the body know when it needs to wee? The doctors find out in the lab! An optical illusion turns Dr Xand’s face green in Mindbenders, and it's time to check in on the Ouchers.