1. On The Fresh Prince of Bel-Air, when Will's dad left him again.
2. On Superstore, when Mateo was deported.
3. On Smart Guy, when T.J. and Melissa met a guy on the internet who turned out to be a pedophile.
4. On The Golden Girls, when Sophia's friend Martha revealed that she was planning on killing herself.
5. On Brooklyn Nine-Nine, when Terry was a victim of racial profiling in his own neighborhood.
6. On Diff'rent Strokes, when a bike store owner kidnapped Arnold and his friends (literal children), gave them wine, and tried to take advantage of them.
7. On Boy Meets World, when Cory's mom gave birth prematurely and it was unknown if the baby would survive.
8. On Brooklyn Nine-Nine, when Rosa had to respond to an active shooter situation.
9. On The Facts of Life, when one of Blair's classmates killed herself.
10. On All in the Family, when Gloria had a miscarriage.
11. On Boy Meets World, when Topanga's professor made inappropriate sexual advances toward her.
12. On Full House, when D.J. tried to starve herself to lose weight for a pool party.
13. On Growing Pains, when Carol's boyfriend drove drunk and died.
14. On Friends, when Monica and Chandler found out that they were unable to have kids.
15. On That's So Raven, when Raven had a vision that the store owner wouldn't hire her because she's Black.
16. On Crazy Ex-Girlfriend, when Rebecca attempted suicide on the plane.
17. And finally, the ending of M*A*S*H, when it was revealed that the "chicken" was actually a baby.
Got a dark sitcom moment that didn't make this list? Tell us in the comments.
Note: Submissions have been edited for length and clarity.