Duck Quacks Don't Echo Season 6 Episode 5 - Sir Trevor McDonald, David Mitchell, Katherine Ryan

Airdate: 2017-Sep-28

Episode summary:

Can wearing a lab coat make you cleverer? David Mitchell, Katherine Ryan and Sir Trevor McDonald join Lee Mack to test the truth of a whole host of zany facts.

About Duck Quacks Don't Echo series:

Can dogs catch yawns from humans? Is it possible to sneeze with your eyes open? And do duck quacks indeed echo? Luckily, Lee Mack’s on hand t...Show more >