Doctor Who's Amy Pond is to fall pregnant in the upcoming series of the sci-fi drama.
The Time Lord's companion - played by Karen Gillan - will be thrilled when she finds out she's expecting a baby and can't wait to tell her hapless husband Rory Williams (Arthur Darvill) the good news.
However, their initial excitement takes a turn for the worse when Rory starts to suspect the baby isn't his, and immediately points the finger at the time-travelling doctor.
An insider explained: "Amy has been obsessed with the Doc ever since she met him as a child and started making her Raggedy Doctor dolls. She went off in the Tardis with him and left Rory behind.
"Rory is suspicious that maybe the pair got it on in the Tardis with before he finally married Amy. The Doc, of course, denies it's him."
However, the titular character - played by Matt Smith - won't be the only person in the frame as the baby's father.
Other potential daddies include painter Vincent Van Gogh - who Amy and the Time Lord met during the last series of the BBC One show when he became smitten with the flame-haired female - as well as a Dalek or even an evil Cyberman.
The source added to the Daily Star newspaper: "It leads to a big who's the daddy plotline."