As far as I am aware , the new series of Nip/Tuck starts again in November on Sky one. It was shown on channel four but due to a slump in viewing figures , it was pulled at the end of the series. The following series was then screened on SKy one and it would seem that this is not set to change in the near future. My hubby hates it but I love it - especially Christian. Mmmmmmmmm. I can't wait for it to come back.
If you don't have access to Sky One , then why don't you email channel 4 and express your dismay at the series being axed and put your argument across. If you can convince them of a following for the show they may bring it back , who knows. Worth a try.