Complex sentence: "Thicker than Water" is the third Christmas special episode of the BBC sitcom, "Only Fools and Horses", broadcast on 25 December 1983, and is the first to be screened on Christmas Day.
Split into simpler sentences: Thicker than Water is an episode of the BBC sitcom, "Only Fools and Horses", broadcast on 25 December 1983. It was the third Christmas special, and the first to be screened on Christmas Day.