The character returned as The Doctor 's sole full-time companion for the whole of the fourth series in 2008 .
The character returned as The Doctor 's full-time companion for the whole of the fourth series in 2008 .
The character returned as The Doctor 's full-time companion for the whole of the fourth series in 2008 .
문장을 간단하게: The character returned as The Doctor 's sole full-time companion for the whole of the fourth series in 2008 . 산출: