They spent two days in the Hub. Rose and Gwen locked themselves in Jack's room and talked. The Doctor took Jack to the TARDIS and the pair was 'fixing' the console. It wasn't till Donna got impatient and snapped.
"Look I know you two are mourning but sitting around in bloody Cardiff is not going to help now get your backsides in to the TARDIS and get a move on"
They ended up in the ninety twenties and got to meet Agatha Christie. As usual something went wrong. A couple of murders that seemed to be done in Agatha Christie's style. And the giant wasp Donna saw, suggested that aliens were involved somehow. To top it off someone tried to poison the Doctor, who was now jumping round the kitchen with salt and protein in his mouth.
"I need a shock, someone gives me a shock" he shouted
Rose and Donna looked at each other desperately trying to think of something.
"Erm…" Donna said waving her hands
"I'MPREGNANT" Rose blurted
The Doctor paused looking pale "what?" he squeaked suddenly his head was thrown back and grey/black smoke flew out of his mouth, he then stumbled back and landed on his backside.
"Typical man" Donna said rolling her eyes "announce you're pregnant and they faint"
Rose helped the Doctor up who was frozen stiff with a shocked look on his face. His hands gently caressed Rose's stomach "you're…you're…you're…" he stammered
"No" Rose said a smile forming on her lips "you wanted a shock so I thought I'd give you one"
"So you're not…?"
"No"
"Do you want to…you know?"
"Maybe…sometime in the future but not now, not after losing Jenny"
"Yeah, yeah"
Donna rolled her eyes again "less talk about babies and more talk about who would want to kill everyone"
It turned out to be the vicar. The vicar was a Vespa/Human hybrid. He could turn into a giant wasp. Agatha Christie managed to stop him at the risk of her own life and in the end she lost her memory. They dropped her off at the hotel she was found a few days later. The mystery of Agatha Christie's disappearance was solved.
Overall it wasn't a bad trip and it did help cheer the Doctor and Rose up. Donna smugly patted herself on the back for dragging the two out of Cardiff.