13 TV series paying a tribute to another series. (Mention both the series)
1. Psych - Twin Peaks
2. Community - Law & Order
3. Castle - Firefly
4. It's Always Sunny in Philadelphia - Seinfeld
5. Seinfeld - Dragnet
6. Sesame Street - Twin Peaks
7. South Park - Scooby Doo
8. WandaVision - Malcolm in the Middle
1. Psych - Twin Peaks
2. Community - Law & Order
3. Castle - Firefly
4. It's Always Sunny in Philadelphia - Seinfeld
5. Seinfeld - Dragnet
6. Sesame Street - Twin Peaks
7. South Park - Scooby Doo
8. WandaVision - Malcolm in the Middle