It all makes sense now! Lena Headey, the actress who plays Cersei, posted this picture on Instagram on April 3. The photo, which shows her and actor Pedro Pascal (who plays Oberyn on GoT) is an instant spoiler alert for yesterday’s episode.
Lena is shown grabbing Pascal’s head, just like the Mountain did in the climactic final moments of Season 4 Episode 8, “The Mountain and The Red Viper”. If you haven’t seen the episode yet, check out the GoT ep.8 recap.
The shot was posted over 2 months ago. That sneaky Cersei… She knew all along!