Fans had expected the time traveller's latest assistant, played by Karen Gillan, to be a policewoman after pictures emerged showing her wearing an officer's uniform. However, it is now thought that she only dons the attire as part of her kissing telegram job.
A source told The Sun: "Everyone thinks she is this prim and proper policewoman, however it's going to be revealed early on that she works as a kissogram.
"It's going to be a bit of a shock for the fans, but I think they're going to enjoy it. Amy Pond's a really strong character and Karen is great in the role."
New executive producer Steven Moffat has also been tipped to spice up the programme in other ways as the forthcoming new series progresses.
The insider added: "Moffat's an edgier writer and the show is going in an exciting new direction."