Coupling (2000)

The one to start with after Sherlock if you want Moffat's comedy at full power. Six friends dissect dating in London, and Moffat, inspired by his relationship with producer Sue Vertue, wrote all 28 episodes. What lifts it above a standard roommate sitcom is the structure. Split runs two breakup aftermaths side by side in split screen, Nine and a Half Minutes replays the same stretch in a bar from three viewpoints, and The Girl with Two Breasts plays half its running time in Hebrew. It was named best TV comedy at the 2003 British Comedy Awards. The fourth series, on BBC Three, brings in a new face and loses some spark, and the short-lived American remake is best skipped.