In the after-credits scene of the latest season finale of “Rick and Morty,” one of the show’s more obscene characters declares: “See you for Season 4 in, like, a really long time.” That episode premiered on Oct. 1, 2017.

It took a little while, but it looks like that promise is on its way to being fulfilled. Adult Swim announced Thursday that it has ordered 70 new episodes of “Rick and Morty” as an element in a long-term deal with the show’s creators, Dan Harmon and Justin Roiland. The order is more than double the amount of “Rick and Morty” episodes that have already aired — 31 in the show’s three seasons.

The announcement seems to end the uncertainty surrounding the show’s future.

In March, Mr. Harmon said on Twitter that a renewal had not yet been ordered.