Talented comics including Johnny Vegas, Jenny Eclair, Rhona Cameron, Doon Mackichan and Fred MacAulay revisit locations in Scotland that have inspired their work, including Edinburgh, Musselburgh, St Andrews and Aviemore. Julian Doyle, Production Manager for Monty Python Films, also returns to Doune Castle where he created the medieval world of the Holy Grail on a shoestring. Alan Whicker narrates.