10. The One with Russ (Series 2, Episode 10)
Trying to balance the funny episodes, and the deeply-serious (but-still-funny) episodes, is always a challenge. This episode is an example of a whole plot structured around a single gag. Rachel starts dating a character called Russ, who is virtually the same person as Ross (both are played by Schwimmer). High-jinks ensue as Russ and Ross meet each other – and immediately despise each other. Additionally, it also includes the perfect ending with a cameo from Julie (Lauren Tom) who inevitably falls for Russ.