Episode One - S1-E1
Revealing mistake: When Gavin and Stacey meet, look at the people all around them in Leicester Square - many of them are stood watching the filming.
Gavin & Stacey (2007)
1 revealing mistake in season 1 - chronological order
Starring: Mathew Horne, Ruth Jones, Alison Steadman, Joanna Page
Episode Six - S1-E6
Continuity mistake: When Gavin and Stacey have their first dance, look carefully and you can see Nessa sat at a table behind them with other people. Seconds later, the camera moves and focuses on Nessa standing at the bar alone.
Trivia: The three main families in the show are named after British serial killers (West, Sutcliffe and Shipman).