The Time of the Doctor

"The Time of the Doctor" is the final episode of the Eleventh Doctor's series in *Doctor Who*. It explores the Doctor's struggle to protect a town called Christmas from a deadly alien threat called the Whisper Men and the introductio of a new, dangerous enemy, the Cybermen. The episode reveals that the Doctor is aging and facing his own mortality. To save everyone, he makes a sacrifice by regenerating into his Twelfth Doctor incarnation. This regeneration symbolizes new beginnings, while also concluding the Eleventh Doctor’s story arc in a dramatic and emotional way.