We’re back to square zero

This nice malaphor was heard on Season 1 Episode 2 of Cold Case Files; “Killing on Christmas Eve”.
22:39 into episode.   Video is below.  It’s a congruent conflation of “back to square one” and “ground zero”, both meaning starting place or at the beginning.  This is a bookend of a previous posting, “starting from ground one”, posted in 2012.  https://malaphors.com/2012/11/07/starting-from-ground-one/.  Both idioms have numbers – zero and one – contributing to the confusion.  many thanks to Mike Ameel for hearing this one, sharing it, and sending me the video to prove it!  This is not fake news, folks.