original: he returns in the 2007 series of doctor who , reuniting with the tenth incarnation of the doctor , and returned again for the 2008 series .
simplifications: he comes back in the 2007 series of doctor who , joining again with the tenth embodiment of the doctor , and returns again for the 2008 series . he comes back in the 2007 series of doctor who , returns with the tenth incarnation of the doctor , and came back again for the 2008 series . he returned for the 2007 and 2008 series of doctor who . he returns in the 2007 series of doctor who , coming together with the tenth incarnation of the doctor , and returned again for the 2008 series . he returns in the 2007 series of doctor who , reuniting with the tenth incarnation of the doctor and returned again for the 2008 series . he returns in the 2007 series of doctor who , joining with the tenth series of lifetimes of the doctor , and will come back again for the 2008 series . he returned in the 2007series of doctor who , reuniting with the tenth ancarnation of the doctore and again in the 2008 series . he returns in the 2007 sries of " doctor who " , renuniting with the tenth incarnation of the doctor , and returned again for the 2008 series .