These original costumes were deemed 'a little too cuddly' and so when the robots returned in "The Web of Fear" they were redesigned. These Yeti robots appeared more compact and had glowing eyes. Brian Hodgson of the BBC Radiophonic Workshop also developed a Yeti roar for this serial, created by slowing down the sound of a flushing toilet. One of the original Yeti from The Abominable Snowmen appeared briefly as a museum display and, upon being reactivated by a control sphere, transformed into the newer model.