This morning on the show, Tim & Jess were joined by Dr. Karl to celebrate sleep week, and we needed his help to tell us about the science of sleepwalking!
He told us the wild things people get up to during sleepwalking, and it blew our minds!
We've also asked if it's ok to wake a sleepwalker, and he told us about the four stages of sleep.
Missed the chat? Here's what Dr. Karl had to say about the science of sleepwalking: