| Award | Season | |
|---|---|---|
| Golden Globe Award for Best Television Series - Drama (2007) | - | winner |
| Primetime Emmy Award for Outstanding Drama Series (2008) | Season 1 | winner |
| BAFTA Award for Best International Programme (2009) | - | winner |
| BAFTA Award for Best International Programme (2010) | - | winner |
| Golden Globe Award for Best Television Series - Drama (2010) | - | shortlisted |
| Primetime Emmy Award for Outstanding Drama Series (2010) | Season 3 | winner |
| BAFTA Award for Best International Programme (2011) | - | shortlisted |
| Critics' Choice Television Award for Best Drama Series (2011) | - | winner |