The Doctor uses the Moderator General's comlink to fool everyone in the city to enter the Harmony Booths so he could reverse the effect of the machine and restore emotions to save the city.
TIMESLIP - The Doctor and K-9 get caught in a time anomaly that is moving time backwards at an accelerated rate. The Doctor discovers an organism is feeding on the TARDIS as he turns down the power to get rid of the creature and return time to normal.
STAR BEAST - a creature has crashed landed on Earth as Sharon and Fudge find the alien and take it in. The Doctor arrives at the same time as an alien hit squad sent to hunt down the alien, capture the Doctor.