After attending a lecture on the appendix with short sighted Dr. Crowfoot, Mike thinks he has appendicitis. Reading from a medical textbook, Mike is sure he has the symptoms & tells the boys who rush him to St Swithins. Mike is shocked when he sees the Doctor who will perform the operation is Dr. Crowfoot.! After the operation, Dr.Crowfoot tells Mike they have to open him up again, it seems Dr.Crowfoot has lost one of his contact lenses.! Luckily for Mike he found it in his pajama shirt pocket & hands it back to the Doctor. (thetvdb.com)