This quote comes from a TV series Star Wars Rebels. The scene where this moment comes from is in Season 3 Episode 18, with the title of ‘Secret Cargo’ (3×18). The show is a part of the Star Wars Universe. | Star Wars Rebels is produced by Lucasfilm
Mon Mothma: We're in the process of building an alliance, uniting the various rebel cells across the galaxy. My challenge to the Emperor was a call to stand against the Empire. My hope is, all who answer it will see that they are not alone.