Thread:Tupka217/@comment-220364-20130706130657/@comment-1038387-20130706133445

There really is no internal chronology. I did some research on this a couple of years back. Here's four season one BTAS episodes that have a date mentioned in them, in chronological order:


 * 1) "The Last Laugh", April 1st
 * 2) "On Leather Wings", July 13th (and after)
 * 3) "Heart of Ice", August
 * 4) "Christmas with the Joker", December 25

In production order, the order would be 2/4/1/3. In aired order, 2/3/1/4. The production order is the only remotely absolute order, while the aired order is completely random. And I'm told the DVD order is also different, but I haven't checked.