The Doctor and Donna make their way independent to Adipose Industries , with Donna arriving at front and the Doctor at the back - he uses his psychic paper to get past the guard . After watching a presentation by Miss Foster they then track down Adipose customers in the office , still unaware of each others' investigations!

That evening Donna visits Stacey whilst the Doctor visits Roger . Donna inadvertently sets off the Adipose cycle early, alerting Miss Foster who sends out a team to recover it . The Doctor uses a detector to try and find the signal source and he and the Doctor miss each other again as they try to track down the adipose . Donna heads home and gets an earful from her mother Sylvia , before deciding to head up 'the hill' to visit her grandfather Wilf at his allotment .

The following day Donna hides in Adipose Industries loos as the Doctor hides downstairs. That evening both sneak about and listen in as Miss Foster interogates the reporter Penny . They see each other and then have to escape over the roof as Miss Foster attempts to capture them .

As the Doctor attempts to stop her at a computer panel Miss Foster activates the signal for the adipose children to be 'born'. Sylvia is on a night out with her friends as they come to life, and people look on in amazement as the adipose children make their way through the streets . The adipose gather outside Adipose Industries and are then beamed up to their parent ships, with Miss Foster unfortunately killed as she is no longer needed .

The Doctor discovers that Donna is packed and ready to journey with him! She heads off with the car keys leaving him to load the TARDIS while she drops them into a bin and tells a blonde woman to let her mother know where they are . She waves goodbye to Wilf from the TARDIS as she heads off for adventure ...