How do I book a time slot with my Merlin Annual Pass? To book in with your Merlin Annual Pass, please use out Annual Pass pre-book option here. Related articles Can I change the date/time of my booking? Why am I booking into a time slot? Are there any restriction dates for using my Merlin Annual Pass at Madame Tussauds Sydney? How close are all the attractions to each other if I wish to purchase a Sydney Attraction Pass? When is the best time to visit Madame Tussauds?