The First Doctor
After defeating the Skaro mutants in 'The Dalek Invasion Of Earth', The Doctor made the very tough and selfless decision to lock his granddaughter Susan out of the Tardis in order to give her a chance of happiness on Earth with new beau David. The Doctor feared that Susan would feel duty-bound to look after his increasingly frail self, so he took the decision out of her hands. Interestingly, the self-imposed loneliness ties in nicely to the isolation endured by the Time Lord in the current era of the show. Anyway, here is the touching announcement The Doctor made to the stunned Susan via the Tardis scanner.
The Second Doctor
Patrick Troughton's sprightly incarnation was a big departure from William Hartnell's cantankerous portrayal, often playing the clown in the face of adversity. In this magnificent scene from 'Tomb Of The Cybermen', The Doctor showcases a different part of his persona as his paternal instinct towards companion Victoria emerges. They share something in common - a lost family.
The Third Doctor
"It's all quite simple. I am he and he is me."
This clip from tenth anniversary special 'The Three Doctors' showcases this incarnation's love of scathing put downs. Even better - he's aiming them at himself! The Jon Pertwee era wasn't all about Venusian lullabies and judo chops, you know.
The Fourth Doctor
The world-weary gravitas of Tom Baker's Doctor is brilliantly captured in this scene from 'The Ark In Space'. It finds the time traveller and companions Harry Sullivan and Sarah Jane Smith on board a spaceship bearing the survivors of Earth after solar flares bombarded the planet. The Doctor's speech about the "puny, defenceless bipeds" is pure genius.
The Fifth Doctor
"Fondness? I'm surprised your emotionless brain understands the word."
Morality and emotions were high on the agenda for the boyish Fifth Doctor, who went toe-to-toe with the Cyberleader on a number of occasions in the sublime 'Earthshock'. This clip doesn't feature their best verbal clash in this story, but it does contain a classic Cybermen invasion moment.
The Sixth Doctor
After a very traumatic regeneration, Colin Baker's Doctor was notably unstable amid a fusion of contradictory elements. Just witness the clash of arrogance and compassion in this clip from 'Revelation Of The Daleks', which also showcases this incarnation's love of winding up the enemy - in this case, Davros - with a posture and verbal delivery that signify superiority.
The Seventh Doctor
The desperate plea The Doctor makes to The Master in this sequence from 'Survival' encapsulates the exuberance and manic maturity of the Time Lord during this era. In particular, the moment where he briefly considers braining his arch-nemesis shows the darker nature of the character that emerged throughout the 26th season. Thankfully, there's not a spoon in sight!
The Eighth Doctor
Well, there's hardly an abundance of evidence to make comments about Paul McGann's stint as The Doctor, but he did have a certain foppish joie de vivre if this snog with Dr Grace Holloway in the 1996 television movie is anything to go by. A Time Lord kissing his companion? It set a very interesting precedent for the modern incarnation of the show...