Dark Tower Forcefield

The TARDIS shudders violently as a luminous energy barrier materializes around it, trapping Turlough and Susan inside. The barrier glows unnaturally bright, casting invasive blue-white light across the control room's metallic surfaces. Waves of energy ripple from the Dark Tower's prison, visibly deforming the time ship's structural frame with incremental pressure, while console lights flicker erratically in response to the external assault. Their combined presence inside the barrier becomes the focal point of escape urgency as the collision of past and present incarnations in the Death Zone closes in on their fragile envelope of containment.