Millie Gibson made her debut in "Doctor Who" only a month ago, and already rumors are circulating about her exiting after just one season. While fans like myself, who lauded the electric chemistry she shared with Ncuti Gatwa in my key takeaways from the Christmas special, are reeling, a possible explanation for her departure has surfaced. There's a theory on why Gibson is leaving, and it comes from something said by none other than Russell T. Davies.

The "Doctor Who" showrunner already made headlines when he suggested in the commentary track for "The Giggle" that every Doctor bi-generated, and now the commentary track from "The Church On Ruby Road" is getting some extra eyes thanks to @WilliamWhoDW.