Torchwood's time lock
From Tardis Wiki, the free Doctor Who reference
A time lock was created by Toshiko Sato, designed to freeze the Hub of Torchwood Cardiff in a bubble in time. It was at the same time impenetrable but inescapable. The time lock was either shut down or damaged when a Dalek trapped at the edge of the bubble was blown up by the Meta-Crisis Tenth Doctor. (TV: Journey's End)
