In theory the TARDIS should be able to change its appearance to blend in
unobtrusively wherever it happens to materialize. In practice, however,
because of a fault in the chameleon circuit, it always looks like a
police box—a minor inconvenience the Doctor hopes to correct.
the mechanism involves a visit to Earth and a trip to the planet
Logopolis—normally a quiet little place that keeps itself to itself.
But on this occasion the meddling presence of the Doctor’s archenemy,
the Master, ensures the disruption of normality. And even the Master is
horrified by the threat of total chaos he unintentionally precipitates—until he finds a way to turn the imminent destruction of the universe
to his own advantage … Download and start listening now!