Tell Us Which TV Plotlines Felt Like The Writers Forgot What Show They Were Working On

Often, when a TV series is on the air for long enough, the writers introduce a plotline that seems so wild or convoluted that it's like they didn't bother storyboarding at all.

Like, how did Riverdale go from "teenage Archie balances his love of football with his love of music" to "a bomb explodes under Archie's bed and gives him the superpower of invincibility"?

Or there's Izzie's romance with Denny's ghost on Grey's Anatomy...

And what about the last episode of Sherlock Season 3, where Sherlock somehow blocked out the fact that he grew up with a sister who's now imprisoned?

Or that One Tree Hill scene where a dog eats Dan Scott’s heart?

Which TV plotline did you think was so bad, it felt like they were making it up as they went along? Share your answers — and why! — in the comments for a chance to be featured in an upcoming BuzzFeed Community post!