19 "Glee" Storylines That Were Surprisingly Dark
These were some heartbreaking moments.
1. When Quinn got into a car accident that paralyzed her while she was texting and driving.

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Episode: "On My Way"
2. When Coach Beiste revealed that his husband was physically abusive.

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Episode: "Choke"
3. When Dave Karofsky attempted suicide after being outed at school.

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Episode: "On My Way"
4. When Marley fainted during sectionals due to an eating disorder.

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Episode: "Thanksgiving"
5. When Ryder and Kitty revealed they were abused as children.

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Episode: "Lights Out"
6. When Unique was harassed in the school bathroom for being trans.

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Episode: "The End of Twerk"
7. When McKinley High went on lockdown after two gunshots were heard from the halls.

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Episode: "Shooting Star"
8. When Kurt was attacked for being gay.

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Episode: "Bash"
9. When Finn learned that his dad actually died from a drug overdose and not in war.

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Episode: "Yes/No"
10. When Kurt's dad had a heart attack.

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Episode: "Grilled Cheesus"
11. When the Glee Club found out Sam's family was living in a motel after his dad got laid off and his family had no savings.

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Episode: "Rumours"
12. When Karofsky threatened Kurt's life if he told anyone he was gay.

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Episode: "The Substitute"
13. When Santana's grandma rejected her after she came out.

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Episode: "I Kissed a Girl"
14. When Quinn's dad kicked her out because she was pregnant.

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Episode: "Ballad"
15. When Kurt found out that his dad had prostate cancer.

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Episode: "Glee, Actually"
16. When Blaine revealed he was attacked for being gay at a school dance.

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Episode: "Prom Queen"
17. When Ryder learned he had dyslexia.

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Episode: "Dynamic Duets"
18. When Emma's OCD was triggered after her parents made insensitive comments about it.

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Episode: "Asian F"
19. And finally, when Sue's sister Jean died from pneumonia.

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Episode: "Funeral"