In May , however , she was reported to be considering quitting the series , although she did express an interest in playing a female version of the Doctor in the future ( possibly related to a proposed Doctor Who spin-off series about Rose which was later dropped ) .
On 10 May 2006 , however , she was reported to be considering quitting the series , although she did express an interest in playing a female version of the Doctor in the future ( possibly related to a proposed Doctor Who spin-off series about Rose which was later dropped ) .