Caleb Dume, better known to Star Wars Rebels fans as Kanan Jarrus, and his master Depa Billaba (who first appeared in Star Wars: The Phantom Menace) experience Order 66 in the opening moments of this episode. This event was first explored in the Marvel Comics series Kanan: The Last Padawan, written by Star Wars Rebels executive producer Greg Weisman. Its depiction here takes some cues from the comic, including the planet of Kaller and an appearance by clone trooper Grey.

Freddie Prinze Jr., who played Kanan Jarrus in Star Wars Rebels, returns to voice young Caleb Dume.

The Order 66 scene features a new version of a music cue from Star Wars: Revenge of the Sith, connecting it to the tragic sequence from the film that shows the eradication of the Jedi Order.

Crosshair's menacing "Good soldiers follow orders" is a familiar phrase for fans of Star Wars: The Clone Wars. It was first uttered on screen by clone trooper Tup when his inhibitor chip activated prematurely with disastrous results in the Season 6 episode "The Unknown."

The Emperor's speech declaring the formation of the Empire is lifted directly from Star Wars: Revenge of the Sith.

With the Jedi's influence removed, the colorful, more individualistic clones of the Republic Army are no more, replaced with the all-white, fully conforming clone troopers.

Echo gives Tarkin a dirty look as he monitors the food fight. The now-cybernetic clone doesn't have much love for the Imperial, who was part of the failed mission on Lola Sayu that led to Echo's excessive injuries, as seen in the Star Wars: The Clone Wars episode "Counterattack."

Recognize the training room? It first appeared in the Star Wars: The Clone Wars Season 3 premiere "Clone Cadets," which featured Echo and other members of Domino Squad in their earlier days.

Saw Gerrera, who first appeared in Season 5 of Star Wars: The Clone Wars, returns in this episode, leading a rebellion on his homeworld of Onderon. One of the first to fight back against Separatist occupation, Saw's fight will continue for almost two more decades before coming to an end in Rogue One: A Star Wars Story.

Andrew Kishino, the original voice of young Saw Gerrera in Star Wars: The Clone Wars, returns to the role.

Kaminoan Nala Se, as chief medical scientist, was instrumental in the development and creation of the clone army. Nala Se appeared in many episodes of Star Wars: The Clone Wars, starting all the way back with the third episode of the series, "Shadow of Malevolence."

Wrecker's treatured tooka doll is a version of a toy enjoyed by children across the galaxy, as seen in Star Wars: The Clone Wars, Star Wars Rebels, Star Wars Resistance, and the kids' game show Star Wars: Jedi Temple Challenge. Galactic travelers can also find the item at the Toydarian Toymaker shop on Batuu.