Escape the haunted 1950s electricals shop!

This week, Mike, Ben and Tony find themselves spookily trapped in a haunted 1950's electricals shop! Will Elvis die before anyone can solve Mike's puzzle? Will Tony take us on a trip through TV memory lane? Will Ben teach me the meaning of 'negative index'? Tune in, should you be stout and brave and stalwart - and find out! Also features the head of Marilyn Munroe.