When this and the previous episode were originally planned to be a single installment, it was titled “Past, Present and Future.” It split into two episodes early in development, with this second part first being called “Future.” It was renamed “A World Between Worlds.”

Among the voices heard during Ezra’s arrival through the portal are Yoda from Attack of the Clones, Obi-Wan and Qui-Gon from the “Ghosts of Mortis” episode of The Clone Wars, Yoda from The Empire Strikes Back, Ahsoka from “The Mystery of Chopper Base” in Season Two of Star Wars Rebels, Ben Kenobi from “Twin Suns” in Season Three and Kanan from Season One’s “Path of the Jedi”, and Ben Kenobi describing the Force in A New Hope.

This episode finally delivers on the promise from Season Two that Minister Maketh Tua made that the Emperor had a very special interest on Lothal.

Vader’s point of view why he would assume Ahsoka died in the explosion of the Sith temple on Malachor is made clear, as there was for a time no trace of her.