The Jedi holoconference featured here is the same call seen from another point of view in Star Wars: Revenge of the Sith. "Shattered," however, reveals that the meeting was actually longer than originally thought.

While Ahsoka senses a disturbance in the Force involving Anakin, she does not completely understand it. But the tremor she feels is Anakin's turn to the dark side -- complete with audio from Star Wars: Revenge of the Sith.

Rex tells Ahsoka, “Find him...Fives!” He’s referring to CT-5555, the ARC trooper who discovered the secret of the inhibitor chips installed in each clone trooper. These events can be seen in the Lost Missions episode, “Orders."

Ahsoka’s faithful droid R7-A7 returns in this episode along with new friends RG-G1 and CH-33P, a.k.a. “Cheep,” a C1-model droid similar to Chopper from Star Wars Rebels.

With auxiliary arms on his head, Cheep is closer to the original Ralph McQuarrie designs for R2-D2 than any droid in Star Wars. (Besides Artoo himself, of course.)

Ahsoka repeats the Guardian’s mantra, “I am one with the Force, and the Force is with me”, first heard uttered by Chirrut Îmwe in Rogue One: A Star Wars Story.

We don’t get more than a glimpse of Darth Sidious in "Shattered," but his head and robe were redesigned to match his look in Star Wars: Revenge of the Sith -- complete with forehead wrinkles and Sith eyes.

As revealed in this episode, Rex is the first of three known clones who removed their inhibitor chips. The others? Gregor and Wolffe, who will go on to battle the Empire alongside Rex in Star Wars Rebels.