Doctor Who: The Mind of Evil

In an attempt to return Ian and Barbara to the twentieth century, the Doctor tries an unorthodox new technique. It causes the TARDIS doors to open in mid-flight, which sets alarms ringing inside the craft. The time travelers arrive on Earth only to discover that they have been drastically reduced in size. They are now tiny people in a world of giant objects. The TARDIS has materialized between the cracks in a garden patio. The garden is teeming with giant worms, ants and cats - all deadly hazards for the miniature time travelers.