Tribophysical waveform macro-kinetic extrapolator: Difference between revisions

|appearances = {{il|[[TV]]: ''[[The Parting of the Ways (TV story)|The Parting of the Ways]]''|[[TV]]: ''[[The Runaway Bride (TV story)|The Runaway Bride]]''}}

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The '''tribophysical waveform macro-kinetic extrapolator''' — or '''extrapolator''' to "save time" — was a long, flat device. It could be ridden like a [[surfboard]]. It would wrap the user in a [[force field|protective bubble]], enabling them to ride the energy from a vast explosion.  

[[Blon Fel-Fotch Passameer-Day Slitheen|Blon Slitheen]] intended to use this to escape early [[21st century]] [[Cardiff]], blowing up [[Earth]] and riding away on the subsequent shockwave of energy. After they realised her plan and captured her, the [[Ninth Doctor]] and [[Jack Harkness]] confiscated it and connected it to augment the recharging of [[the Doctor's TARDIS]]. Knowing that anyone who would arrest her would have confiscated the extrapolator, Blon programmed the board to connect the nearest [[alien]] power source — in this instance, the TARDIS — to open the [[Cardiff Space-Time Rift]]. The strain of pulling the ship apart opened the [[Heart of the TARDIS]] and regressed Blon to an egg. The extrapolator remained connected to TARDIS systems. ([[TV]]: ''[[Boom Town (TV story)|Boom Town]]'')

It was later used by the Ninth Doctor and Jack Harkness to create a [[Extrapolator force field|Force Field]] around the TARDIS to protect it from the [[Dalek]]s' missiles. It was again used to shield the upper floors of the [[Satellite Five|Game Station]] from the Daleks' [[transmat]]s. ([[TV]]: ''[[The Parting of the Ways]]'')

By the time the [[Tenth Doctor]] used it to move the TARDIS two hundred feet away from the [[Empress of the Racnoss]], it appeared to have been integrated into the TARDIS systems. It was connected by a line and wrapped in [[TARDIS coral]]. The Doctor encouraged operation with percussive maintenance. ([[TV]]: ''[[The Runaway Bride]]'') Later, the extrapolator's shielding was still in use by the Doctor, but it was no defence against a [[New Dalek Empire|fully-formed Dalek empire]] capable of taking planets out of orbit. ([[TV]]: ''[[Journey's End]]'')