"Read Leader to Red 1 ... Watch out Reggie old man, bandits at 4 o'clock" "Red 1 to Red Leader ... Jolly good show, Bertie, looking forward to a spot of action before tiffin. Happy hunting"
An underground maze of caverns. A subterranean river flooding its banks. A team of the world's most brilliant geologists doomed to a watery grave. All that is available is your airship. Dare you take this unusual craft into unknown territories or do you chicken out and stick to joyriding in open spaces? Surely there can be no doubt?