When Spike travels with Twilight and Sunburst back to the Crystal Empire to visit Flurry Heart, they discover the entire empire in a panic due to the reported presence of Changeling spy.
Cast of The Times They Are a Changeling
Tara StrongTwilight Sparkle (voice)
Andrea LibmanPinkie Pie / Fluttershy (voice)
Ashleigh BallRainbow Dash / Applejack (voice)
Tabitha St. GermainRarity / Princess Luna / Granny Smith / Mrs. Cake (voice)