100 Fireball XL5 Annuals for Agents!

100 Fireball XL5 Annuals for Agents! was a 21 competition printed in TV Century 21. Although the prize was unrelated to the Doctor Who universe, it heavily concerned the events of the crossover Icemen of Space.

The competition was started in TV21 35 where the rules and prizes were outlined. It was partially in-universe, being addressed to agents of the Universal Secret Service. For a chance of winning, readers had to answer three questions about the Fireball XL5 comic story Icemen of Space (the second part of which was printed in the same issue) as well as list the six features of the magazine they liked best. The closing date was 23 September 1965. It was stated that the entries would then be put together with the entrants of the first hundred correct solutions selected at random being declared the winners.

The winners were rewarded with a copy of the 1966 Fireball XL5 Annual each. It does not appear as if the names of the winners or the answers to the questions were ever printed in the magazine.

Questions and answers
1. What is the name of the planet which Fireball is on in this week's edition of TV 21?
 * Uraniture

2. What are the names of the two surveyors Steve and the crew are trying to find?
 * Bentley and Estermil

3. What is the name for the hover motorbikes which Steve, Mat and Venus ride on?
 * Jetmobiles