What production code is listed for The Vat of Acid Episode?

The production code listed for “The Vat of Acid Episode” is RAM-408. The code identifies the episode in the show’s production records, while its broadcast position is season 4, episode 8.

The episode aired on May 17, 2020, and was written by Jeff Loveness and Albro Lundy, with Jacob Hair directing. Its title refers to Rick’s fake vat of acid, which he uses during a confrontation with alien gangsters. Morty later pressures Rick into creating a device that appears to let him return to an earlier “save point.”

The device produces the episode’s darker science-fiction twist: it does not simply rewind time. Instead, it moves Morty into alternate dimensions, replacing versions of himself and leaving the displaced realities in chaos. Morty’s romantic storyline gives the premise an unusually emotional edge, because he must choose between preserving his relationship and resetting his mistakes.

The episode is sometimes remembered primarily for the save-point remote or the fake acid vat, but RAM-408 is the production identifier—not a plot device or an episode number. It also won the Primetime Emmy Award for Outstanding Animated Program.