Everything is white, sterile and clean, and the white doesn't want the travelers to leave. Ian and Barbara have both witnessed the death of the other and can't understand how they are still there. Ian falls into madness and kills the Doctor, again and again, broken with a blood as red as humanity, only to be reborn with a new face time after time. Susan attacks Ian verbally, berating him for a decade of self-pity when she and her Grandfather have seen, and thus lost, so much more than he can imagine. Mortimore examines humanity in all its forms.
Campaign is a series of philosophical questions.
The image of Ian gathering the courage to slit his own throat is one of the most humanizing moments in all of Doctor Who. The Doctor often dreams that his family sleeps while he's away, a nice allusion to Lungbarrow. I personally like the talking Bulldog with the Bronx accent that reminds me of a Connie Willis novel. Campaign takes Doctor Who themes and characters to another level. It uses them to question the nature of loss, anguish, love, passion, contempt, idolitry, monotony, drunkeness, injury, lust and so forth.