Sorry for the doublepost, but there's something that I really want to address.
There's a classic Doctor Who episode called, 'The Happiness Patrol', it is from Slyvester McCoy's Doctor.
Ace and the Doctor arrvie on a diffrent planet where happiness is forced apoun people. If the people feel any other emotion than happiness, they will be exercuted. They are exercuted by being boiled alive by molten hot candy. In this society there is a group called, 'The Happiness Patrol', they are a group of women who are forced to be in the patrol, or die. This society is ruled by a woman who is a satire of Margaret Thatcher, with her pet, Fifi. The antagonist is the source of this episodes bad reputation and ridicule, the antagonist is a robot that's made of candy, called, 'The Kandy Man', he makes candy that kills people. The Happiness Patrol even painted the TARDIS pink, because the blue looked depressing.
The Doctor makes a great speech at the end of this episode about emotional balance, he says that you need both good and bad emotions in life. He compares emotions to a coin, it's a bit of a rubbish metaphor, but it works to some extent.
Go to 3:20.
And if you want to know what the Kandy Man looks like;
[spoiler]
