The story in each show was that the two celebrity contestants and a member of the public had travelled by spaceship to the planet Arg.
[1][2] The programme was devised by experienced BBC producer Patrick Dowling (who also introduced episodes of series 2).
In Series 2, they didn't look like dragons, but were furry, with no tails and mask-like faces, and primarily differed in colour.
In Series 3 and 4, their heads returned to looking like dragons, with ruffs, though they had furry bodies and monkey-like tails and were almost identical to each other.
Notable contestants included Keith Chegwin, Sue Cook, astronomer Heather Couper, John Craven, Paul Darrow, Noel Edmonds, Sarah Greene, Bonnie Langford, James Burke, Elizabeth Estensen, Janet Fielding, and Richard Stilgoe.
Many tasks involved the drogna, a small transparent plastic disc containing a solid geometric figure, which was the currency of Arg.
In 2016, the show was made available to purchase for the first time, with seven episodes from the first two series available digitally from the online BBC Store.