4 Cleverly Hidden Rick and Morty Easter Eggs You Could Have Missed

Aliens from famous movies and a connection to Gravity Falls.
There's a bit of a challenge with Rick and Morty: the entire series is one big Easter egg. Even the titles of each episode reference famous movies or TV series. It's all the more interesting, though, to choose less obvious and more ironic details.
1. Aliens From All the Movies Gathered at Interdimensional Customs
In the pilot episode, Rick and Morty tried to smuggle alien seeds through interdimensional customs. Of course, Rick suggested that Morty hide them in a very specific way.
When the viewers are first shown the customs office, they can see aliens from Alien and District 9, as well as the Moonies from Fast Food Nation, walking around the waiting room.
2. Uncle Stan's Gravity Falls Stuff Made Its Way into Rick and Morty
To understand this Easter egg, you need to have watched the animated series Gravity Falls. In one of the episodes, one of the main characters, Stan, continues building his mysterious machine.
Suddenly, a portal opens and sucks three objects from his hands: a notebook, a pen, and a yellow mug with a question mark.
Where do they go? It turns out that the objects ended up in the world of Rick and Morty. In the Rick and Morty episode Close Rick-Encounters of the Rick Kind, the main characters pass by several portals between dimensions, and Stan's things fly out of one of them.
3. Rick Brought the Parasites in the Episode Total Rickall
In Season 2, Episode 4, aliens disguised as relatives and friends of the Smith family invade their house. The family is forced to kill them all.
The episode never explains where the aliens came from. Rick mentions in passing that someone brought them on the sole of a shoe or an alien fruit. This mystery is actually solved two episodes earlier.
In the finale of Mortynight Run, Rick loads green crystals into his flying saucer. Bright pink eggs of the parasites are visible on one of them – the same parasites that were on the back of the first alien they killed, who pretended to be Uncle Steve.
4. Jerry Keeps a Framed Portrait of Doofus Rick in His Garage
Jerry, the father of the Smith family, is the main target of his father-in-law's ridicule. The only person loyal to Jerry was Doofus Rick. The two met in the episode Close Rick-Encounters of the Rick Kind and quickly became friends.
The other versions of Rick began to make fun of them both. They even said that Doofus Rick came from a world where people eat their own feces.
In the episode The Rickshank Rickdemption, there is a touching reference to this. Jerry secretly keeps a portrait of his friend Doofus in a garage locker.