After a steady run of great episodes, Rick and Morty season 7 falters with a one-note storyline stretching out a post-credits scene to a full half-hour. In “Rise of the Numbericons: The Movie,” Morty gets swept up in a war between letter-shaped aliens and number-shaped aliens. This might be the most disappointing episode of season 7 so far. There’s no deeper meaning, there’s no emotional core, and there’s only a couple of laughs. The other Smiths are nowhere to be seen – including Rick, one of the title characters – as the episode bombards viewers with grammatical and numerical puns that elicit more eye-rolls than chuckles.