Dizi Adı: The Great
Bölüm Adı: Once Upon a Time
Sezon/Bölüm: 3. Sezon 10. Bölüm
Yayın Tarihi: 12 May. 2023

Catherine meets court scientist Nikolai, who announces a comet is about to pass through Russia. She uses this phenomenon to her advantage and in the face of some huge challenges, unearths a new side of her leadership.