his episode rings the changes on the "interdimensional cable" episode screened every season. Instead this one is about the memories Rick has erased because they are too traumatising for Morty.
The episode starts off with Morty looking into the truth turtle's eyes, although Rick lambasts him since he will know everything, Rick offers a solution to erase the memory from his mind, and Monty agrees. Then Rick wants to see the erased memories by watching interdimensional cable.
One of the memories is Moonspiracy, in which Morty belives that one of the teachers lives on the Moon. After the teacher is found dead, probably suicide - he was fired because the head teacher thought he was a paedophile - it is revealed that Morty just saw dirt on the lense. After a few funny memories of Morty, it is revealed that Rick also erased memories of Morty one-upping him, and they get into a fight where they erase their own memories by accident and try to regain them by viewing more memories. The episode ends with Summer following Rick's backup plan. There's a possibility that they would accidentally erase their memorise, but judging by Summer's tone, this is unlikely. Over all this episode is a good one and a welcome change to the interdimensional cable episodes.