Doctor Who: The Doctor's Regeneration Episodes Ranked Worst To Best

Lots of firsts in this one, from the base under siege plot that would become a Who trope, to the dramatically ominous and creepily effective introduction of the Cybermen, to Ben's ventilator shaft escape clearly the inspiration for John McClane's "Now I know what a TV dinner feels like". And something else. Something important...

For those of us whose first introduction to the Whoniverse was the 2005 reboot - and used to visual effects by the likes of DNEG - it would be easy to deem this serial as rather dated; when, in fact, it has a childlike imagination about it.

Akin to Jodie Whittaker's audition tape, in which she defused homemade props, you could playfully recreate the tension of being the two astronauts in the Zeus IV spaceship; make your own Cyberman complete with death by light bulb weapon; and create a model of their descending spaceship using that famous Blue Peter sticky back plastic - such Sellotape was actually used on the Cybermen headpieces.

The Mondasian Cybermen are still the most unnerving versions of these cyborgs. Especially their seemingly stretchable faces, which conjures up the face stretching scene from Terry Gilliam's Brazil.

The First Doctor's final adventure is in keeping with Cybermen characteristics: it efficiently navigates around William Hartnell's ill health he was sadly going through off-screen at the time. When he is on-screen, there is no mistaking that mischievous all-knowing, authoritative glint in the Doctor's eye as he confronts General Cutler.

Goodbye the Doctor. Hello new beginnings: the seminal moment in all of Doctor Who history sees Hartnell handover the TARDIS to a man who would become the archetypal incarnation of our favourite time travelling hero.