9.In Watchmen, Angela recreates the iconic smiley face from the Watchmen comics while visiting a class.
10.In The Good Place, Chidi says that his brain constantly makes the sound of a fork in a garbage disposal. In Season 3, after breaking up with his girlfriend, Chidi turns on the disposal with a fork in it and is unfazed by the noise.
11.Also in The Good Place, on Simone's investigation board, you can see that she thinks Janet is asexual.
12.In Game of Thrones, during the last opening credits, you can see that the Lannister lion that's usually above the Iron Throne is smashed.
13.Also in Game of Thrones, the outfit Sansa wears when she officially becomes Queen of the North has nods to all of the Starks.
14.In Elite, a group dressed as characters from Money Heist/La Case de Papel walks past Carla right before Nano arrives — Nano is played by Jaime Lorente, who stars as Denver in Money Heist.
15.In The 100, Clarke's mind palace featured several Easter eggs for longtime fans, including memories of Lexa, Finn, and Octavia landing on the ground for the first time in the pilot.
16.In Stranger Things, Eleven has the bird poster from Mike's basement hanging on her bedroom wall.
17.Also in Stranger Things, Dustin's girlfriend Suzie has his old red, white, and blue hat on her nightstand.
18.In Russian Doll, the three guys Nadia meets in the bodega actually appear more than once and seemingly as different characters. They're seen in the bodega, at Nadia's office, and as EMTs.
19.Also in Russian Doll, you can spot Alan walking through Tompkins Square Park. This is before Nadia meets him in the elevator.
20.And in Russian Doll, during the final scene where Nadia joins the parade, you can actually spot two other Nadias walking past her.
21.In The Politician opening credits, you can see that the book after Barack Obama is called "Idiot's Guide to Clowning."
22.Also in The Politician opening credits, you can see that Payton is passing his "Politicizing Beyoncé" class.
23.In Legacies, Lizzie gives Hope the exact dress that Klaus gave Caroline for the Mikaelsons' ball in Season 3 of The Vampire Diaries.
24.Also in Legacies, MG is given the old camcorder that Kai used to make a video for Bonnie during The Vampire Diaries.
25.In American Horror Story: 1984, when the Camp Redwood counselors pull up to a gas station, it's an homage to Texas Chainsaw Massacre.
26.In Arrow, when Oliver visits Laurel on Earth-2, you can see that Vixen, Ragman, and Steel are on Team Black Canary alongside Laurel and Adrian Chase as Green Arrow.
28.In Looking For Alaska, while Miles is making a phone call, you can spot the name "Katherine" and turtles underneath the payphone, which are nods to John Green's other novels An Abundance of Katherines and Turtles All The Way Down.
29.Also in Looking For Alaska, when Miles and Lara are lying in bed watching TV, you can hear The O.C. theme song playing. Josh Schwartz was the showrunner for both shows.
30.In Batwoman, Alice has "Twinkle, twinkle, little bat. How I wonder what you're at!" written on the wall behind her throne. This is part of the poem recited by the Mad Hatter in Lewis Carroll's Alice's Adventures in Wonderland.
31.Also in Batwoman, all of the episode titles are phrases or quotes from Alice In Wonderland.
32.In The Twilight Zone, after revealing that the Blurryman was original host Rod Serling, you can actually spot him in the background of numerous episodes.
33.And finally, in Supergirl, the sign seen at the beginning of "Crisis on Infinite Earths" is an homage to Superman II starring Christopher Reeve.
Did you spot any other TV Easter eggs this year? Tell us in the comments below!
It's the end of 2019, and we're looking back on the year. Check out even more Best of 2019 content here!