Temporal prison

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File:Dalek temporal prison.jpg
The TARDIS is disabled by a temporal prison.

Temporal prisons or, to use the Doctor's phrase, chronon loops, were a weapon used by the Daleks.

When the Doctor's TARDIS materialised on Earth during the War in the Medusa Cascade, the New Dalek Empire initiated a temporal prison that disrupted power from it, in order to immobilise it. The weapon's appearance was a hoop of blue energy which encircled its target. The TARDIS was then dragged to the Crucible. (DW: Journey's End)

See also