In Australia , Eleven released a short trailer for " The Eclipse " , featuring scenes from the various events that occur in the episode . British broadcaster , Channel 5 created their own promo , with the tagline " Four life-changing events . One unmissable episode . " " Episode 6646 " was aired on 20 May 2013 in Australia and almost a month later on 17 June in the UK . A real annular solar eclipse occurred in Australia ten days before the episode aired there
annular solar eclipse
Solar eclipse of May 10, 2013
Episode 6646