Doctor Who: Planet of Giants (DVD)

Disc in mint condition. 

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. Worse still, the TARDIS crew learns that this garden is the testing site for a deadly insecticide, DN6. Developed to eliminate all insect life, the chemical may be equally effective against miniscule time travelers.