Dalek holding cell

Holding cells were used by the Daleks inside the Crucible.

The holding cell appeared to be nothing more than a spotlight in the ceiling. When impacted, the blue energy of the cell was visible. There was some discrepancy in how the holding cell appeared when activated: sometimes, only the light in the ceiling was seen until the cell was impacted and the energy was visible, but on at least one occasion, the forcefield visibly descended when the cell was activated. (TV: Journey's End)