1. First, the entire Gargoyle King storyline on Riverdale.
2. The mother dying and Ted subsequently ending up with Robin on How I Met Your Mother.
3. Dan being revealed as Gossip Girl on Gossip Girl.
4. Michael "dying" and then coming back to life with amnesia on Jane the Virgin.
5. Daenerys turning into a "Mad Queen" on Game of Thrones.
6. Clarke shooting and killing Bellamy over a sketchbook on The 100.
7. Poussey dying on Orange Is the New Black.
8. Fonzie literally jumping the shark on Happy Days.
9. Matthew getting into a car accident and dying on Downton Abbey.
10. Landon turning out to be a phoenix on Legacies.
11. Also on Legacies, Finch being upset with Josie for not telling her about being a Gemini Coven twin.
12. Logan being killed off right after he and Veronica got married on Veronica Mars.
13. Andrew kidnapping Olivia in order to start a war between the US and West Angola on Scandal.
14. Luke turning out to have a secret daughter on Gilmore Girls.
15. Deb's therapist convincing her she was in love with Dexter on Dexter.
16. Beth's death on The Walking Dead.
17. Bones' pregnancy and rushed relationship with Booth on Bones.
18. And finally, Spencer having a secret, evil British twin on Pretty Little Liars.
Reminder that I, Kelly Martinez, do not necessarily endorse all of these opinions!!!
Note: Some submissions have been edited for length and/or clarity.