Regeneration (home video)

Regeneration was the the name in the title card of the fourth in the Reconstructions series.

It featured David Bradley playing the First Doctor and not William Hartnell. Reece Shearsmith also portrays the Second Doctor. The initial version was a recreation of the regeneration scene from The Tenth Planet.

An extended version, listed in the DVD as Regenerations, with an added scene with Mark Gatiss as the Third Doctor was released on the An Adventure in Space and Time DVD. Though the titlecard still said Regeneration.

This video was a visual representation of regeneration and not a literal depiction of the events of the first two regenerations.

Synopsis
It's a form of renewal, it has happened before and it will happen again.

Plot
Within the TARDIS, the First Doctor lies on the floor. As he lays unconscious he begins to glow. This is when he regenerates into the Second Doctor.

We then see the Second Doctor also begin to glow when he too regenerates, this time into the Third Doctor.

Online version

 * First Doctor - David Bradley
 * Second Doctor - Reece Shearsmith

DVD version

 * First Doctor - David Bradley
 * Second Doctor - Reece Shearsmith
 * Third Doctor - Mark Gatiss

Crew

 * Writer - Kit Pedler, Gerry Davis (reconstruction devised by Mark Gatiss)
 * Director - Terry McDonough
 * Producer - Matt Strevens

Worldbuilding

 * The Doctor regenerates.

Story notes

 * The online version is an accurate recreation of the original regeneration sequence seen at the very end of The Tenth Planet. The First and Second Doctors were originally played by William Hartnell and Patrick Troughton respectively.
 * The DVD version adds a scene with Mark Gatiss as the Third Doctor.
 * Mark Gatiss had previously portrayed the Doctor in The Web of Caves.

Home media
They were released with the DVD and blu-ray release of An Adventure in Space and Time. It was a extended version with the Second Doctor regenerating into the Third Doctor, portrayed by Mark Gatiss.