The Muppets will be back on the small screen this christmas with a brand new special starring Lady Gaga, Joseph Gordon-Levitt and Elton John. But what if you can't tell your Gonzo from your Fozzie Bear? Don't know why they're fashion's favourite puppets? Have no access to a TV at your parents? Can't even watch it online because their wifi password looks something like 'XsD5Hhi9Op'? Never fear... we'll give you a Muppets masterclass in less time than it takes your third cousin twice removed to say something passive aggressive.