Eagle eyed viewers of Sunday night's episode of Cartoon Network's Rick and Morty saw one fan favorite character hidden in the background.

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The second episode of Rick and Morty season 2 aired last night, and many may not have noticed a special character in the background of one scene.

After Rick and Morty arrived at Blips and Chitz, a Mr. Meeseeks was seen in the back helping someone achieve a high score on an arcade game. Mr. Meeseeks gives the character a helpful hint right before he disappears, as Meeseeks are accustomed to do. View the cameo appearance here.

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The reappearance of Meeseeks will surely delight fans. The creatures first appeared on the show in the fifth episode of season 1, titled Meeseeks and Destroy. They quickly became a fan favorite.

As fans know, Meeseeks are invented with the sole purpose of fulfilling one particular task, after which they disappear into thin air.

Don't expect a huge reappearance of the creatures in season 2, though. Rick and Morty co-creator Justin Roiland recently spoke with The Hollywood Reporter about Mr. Meeseeks that the creatures aren't making a big comeback in season 2.

"We didn't realize how popular that character was going to be, so I don't know how that's going to affect us as we move forward," Roiland said. "We didn't think to do a story or do anything too much with him in Season 2 aside from a couple of little subtle, inconsequential cameos."

Rick and Morty airs Sundays at 11:30 p.m. ET/PT on Cartoon Network.

Tags: rick and morty television Cartoon Network