"doctor Who" The End Of Time: Part Two(2010) -

: He sees her in early 2005, shortly before her first meeting with the Ninth Doctor. Regeneration

: He absorbs the lethal dose of radiation, triggering a slow, painful regeneration. The Farewell Tour

After believing he has survived the prophecy that he would die when someone "knocks four times," the Doctor finds Wilfred Mott (Bernard Cribbins) trapped in a nuclear booth about to be flooded with 500,000 rads of radiation. "Doctor Who" The End of Time: Part Two(2010)

: To save Wilfred, the Doctor must take his place in the second booth.

The Doctor thwarts this by destroying the diamond with a gun, severing the link and sending the Time Lords and the Master back into the Time War. : He sees her in early 2005, shortly

: He gives her family a winning lottery ticket at her wedding.

Before his final transformation, the Doctor uses his remaining time to visit his past companions in secret: : He saves them from a Sontaran sniper. : To save Wilfred, the Doctor must take

Finally returning to the TARDIS, the Doctor utters his last words, "I don’t want to go," before regenerating into the Eleventh Doctor (Matt Smith) in a blast of energy that heavily damages the TARDIS interior.