Rick traps Morty and Summer in a Matrix -like simulation called Chargeria for 17 years because they stole his phone charger.
There are several other pieces of "Extra" content often categorized as special episodes: Rick and Morty Specials - Episode 1
Summer becomes a powerful corporate villain within the simulation to prevent Rick from erasing her memories upon waking. Rick traps Morty and Summer in a Matrix
A 64-page Halloween Special comic often categorized as a "Special 1" in literature. Rick and Morty Specials - Episode 1