The Crystal Cube was a mockumentary television pilot written by and starring Stephen Fry and Hugh Laurie. The pilot was one of Fry and Laurie's first television appearances and the first show they had written themselves. However, the BBC chose not to take it to a full series, and Fry and Laurie did not get a chance to make their own programme for the BBC until 1989, when they produced their first full series of the more conventional sketch show A Bit of Fry and Laurie (thetvdb.com)