10 Most Terrifying Deaths In Modern Doctor Who
7. Killer Sat Nav
2008's The Sontaran Stratagem saw the long-awaited return of the Sontarans, and a new diabolical plot involving killer Sat Navs.
Discovering the Sontarans' plan to use the newly-installed ATMOS devices to gas the Earth's population, investigative journalist Jo Nakashima attempted to warn UNIT. Having infiltrated ATMOS-inventor Luke Rattigan's academy, she had all the evidence she needed to reveal their sinister scheme.
Getting into her car and setting a course for UNIT HQ, Jo began to worry when her ATMOS system began to point her in the wrong direction. Arriving at the edge of a river, her ATMOS system told her 'This is your final destination' and directed her to drive straight ahead. Jo tried desperately to correct its mistake, but the Sat Nav had other plans.
Failing to turn ATMOS off, Jo instead watched as the system hijacked her car. The Sontarans were in control.
With the doors locking - trapping her inside - Jo was helpless as the car launched itself into the river. Locked in as the car hit the water, Jo quickly drowned - her message of warning to UNIT going undelivered.