Naturally, it’s spoilery stuff – and we don’t really want to upset anyone who might be trying to look away as far as the spoilers go.
While Gillan refused to be drawn on what was going on later in the story, she was prepared to let slip a few details about the beginning of the adventure…
“It starts with the Doctor saying he’s going to take Amy to the very first planet in existence, but when they arrive there they find a message from River Song.
“The message rings alarm bells for the Doctor – and then they find River dressed as Cleopatra.
“There’s more to it than meets the eye. The two episodes are really scary – it’s the Doctor’s worst nightmare.”
It certainly sounds an intrigueing and enticing opening episode to the two-part finale – we’ll find out more as Saturday approaches.
Catch The Pandorica Opens on Saturday night at 6.40pm on BBC One and BBC HD.