While not always S4E4, the "Looking Glass" motif is a staple in television history due to its literary roots in Lewis Carroll's work:
The episode explores the consequences of past actions, specifically regarding the Sunfire Elves and the growing influence of dark magic. [S4E4] Through the Looking Glass
Aaravos's dark history is revealed, and the human mage Callum finds himself becoming a focus of the archmage's interest. While not always S4E4, the "Looking Glass" motif
The character Birkoff faces his first field mission, highlighting his vulnerability and the pressure of Section One's high-stakes environment. While not always S4E4