By the time of this broadcast, the actual pilot for the series had aired nearly 12 years earlier.
No date is given, but clearly it's before the last regular episode (where René elopes with Yvette).
This event brings them to remember the incidents which took place during World War II; in particular the events which took place in their hometown of Nouvion.
What follows is a collection of highlights from the show's eighty-five episodes, interwoven with Edith and René's reminiscences.
A complete list of the archive footage: At the end of the episode, René and Edith re-affirm their love for each other; the archive clip of them singing When You Were Sweet Sixteen together (5.18) is shown; and the final scene is of them clinking champagne glasses together.