The Doctor and Leela land on Pluto in the far future and discover that it's inhabited by humans. Leaving K9 in the Tardis, the pair meet a man contemplating suicide after he's unable to pay his father's "death tax".
The Tardis lands on Pluto in the far future. Instead of being a lifeless rock, there's scented air, massive buildings, six suns, a human population subjugated by crippling taxes from a government called "The Company," and a man about to commit suicide.—statmanjeff