This is interrupted when the Family begin using the weapons on their ship to destroy the nearby towns until Smith surrenders the doctors life force. At that time Latimer shows up and gives Martha the watch containing the life force of the doctor. At first wild with racing thoughts of his true identity, John inevitably choose to hold the watch. A few moments later when the Family think John has surrendered the doctor to them,in fact the deed has already been done. The now reformed doctor destroys the ship forcing the Family Of Blood into retreat. They are placed in the cosmos,mirrors and in scarecrows before the doctor invites Joan to join him as a companion. When she rejects the offer, Martha and the doctor retreat in the TARDIS-giving Latimer his watch as a thank you present. Their last visit to Latimer is when he is an elderly war hero-the only survivor of his WW1 troop thanks to the watch's unique sense of time.
A sprawling and epic story, both in writing and scope this episode explores the more philosophical aspects of the doctors character then either its predecessor or perhaps any other Doctor Who story. Because the doctor is represented hear more as an energy force than a physical being, we are led to wonder if time lords even perceive sentience in the same manner as any humanoid being does in the least bit. Not only that but John Smith's identity crisis when learning who he really is makes one wonder if time lords don't also have completely duel consciousnesses beyond human perception. This is also illustrated in his insistence to Joan Redfern that who John Smith was is a part of his own conscience. Still it was a heartwarming ending for the doctor and Martha to visit the elderly hero Latimer when he received his heroes honor.