https://www.tvmaze.com/episodes/2034444/mcdonald-dodds-2x03-the-war-of-the-rose
This episode has had an airdate of 20/08/2021 erroneously added, presumably copied from the erroneous airdate on TheTVDB. This episode has yet to be broadcast and as far as I can see currently has no airdate. I tried to edit the episode to remove the erroneous airdate, but it does not appear to be possible to leave the airdate blank.