Turlough surrenders to crystal’s command
The sentient crystal dominates the moment entirely, asserting direct psychic control over Turlough through invisible pressure. Its commands warp his vocalizations, twisting his words into promises he does not intend while probing for weaknesses ('Fail me again'). It manipulates him into confessing an escape plan and demanding a way to recreate a door function, all while probing his obedience. The crystal’s physical presence is unseen but catastrophic—its humming latent energy manifests only through Turlough’s anguished body and forced speech.
Before:
Active and fully engaged in mind control, already having forced Turlough into submission through sustained psychic coercion.
After:
Its control is interrupted and disrupted by Tegan’s intervention, causing its influence to flicker before it presumably reasserts dominance, leaving its status temporarily weakened.