The Friends episode when someone else played Monica Geller

Even die-hard fans wouldn't pick up on this.

During his acting career, Joey Tribbiani had a 'mixed' range of roles on-stage and screen. His most memorable role was his iconic turn as Dr Drake Ramoray - and his evil brother Hans - in Days of Our Lives, but we were always far more interested in Tribbiani's less heralded work. We're big fans of his performances in Mac and C.H.E.E.S.E, Shutter Speed (Betsy's been dead for 10 years!) and Boxing Day (I’m gonna get on this spaceship, and I’m gonna go to Blargon 7 in search of alternative fuels), but even during his illustrious career as an actor, it's unlikely that even Joey could 100% change his physical appearance in between takes. There's a reason for the error below, apparently the reformatting of the show to fit wide screens has meant that what should have been out of shot is now suddenly very visible. It's either that or Friends employed the worst continuity supervisor in the history of TV. https://twitter.com/Nick_Pettigrew/status/802920687434366976?ref_src=twsrc%5Etfw