Match of the Day

There were the contracts, the agents, the local
sponsors, the pay-per-view broadcasts, the independent verification of
results, the laws which made murder legal in carefully defined
circumstances... It had taken a long time for the system of freelance
duellists to be established, and an even longer time to develop the
league of interplanetary superstars the others fought to reach and to
challenge. And just when it was all working satisfactorily and
profitably someone or something started interfering with the set up.

Famous fighters died in private duels. Up-and-coming professional
fighters began to fall victim to casual, one-time challengers — the sort
of psychos and testosterone-addled drunks who would themselves be
expected to die quickly and routinely.

When Leela is challenged to a duel to the death, the Doctor realizes
that there is more to the situation than simple murder and mayhem. But
before he can sort it out, he needs to save his client — Leela. How long
can she survive on a planet where not to kill is an offence punishable
by death?

This adventure features the Fourth Doctor and Leela.