Ratings data courtesy of BATB and denotes seven-day viewership.
| Episode Number | Title | UK Air Date | UK Viewers |
|---|---|---|---|
| Season 1 | |||
| 1.01 | Pilot | 22/10/12 | 1.85m |
| 1.02 | Honor Thy Father | 29/10/12 | 1.73m |
| 1.03 | Lone Gunmen | 5/11/12 | 1.72m |
| 1.04 | An Innocent Man | 12/11/12 | 1.75m |
| 1.05 | Damaged | 19/11/12 | 1.86m |
| 1.06 | Legacies | 26/11/12 | 1.62m |
| 1.07 | Muse of Fire | 3/12/12 | 1.59m |
| 1.08 | Vendetta | 10/12/12 | 1.61m |
| 1.09 | Year’s End | 17/12/12 | 1.49m |
| 1.10 | Burned | 21/1/13 | 1.31m |
| 1.11 | Trust But Verify | 28/1/13 | 1.36m |
| 1.12 | Vertigo | 4/2/13 | 1.41m |
| 1.13 | Betrayal | 11/2/13 | 1.46m |
| 1.14 | The Odyssey | 18/2/13 | 1.44m |
| 1.15 | Dodger | 25/2/13 | 1.47m |
| 1.16 | Dead to Rights | 4/3/13 | 1.51m |
| 1.17 | The Huntress Returns | 25/3/13 | 1.42m |
| 1.18 | Salvation | 1/4/13 | 1.46m |
| 1.19 | Unfinished Business | 8/4/13 | 1.38m |
| 1.20 | Home Invasion | 29/4/13 | 1.20m |
| 1.21 | The Undertaking | 6/5/13 | 1.20m |
| 1.22 | Darkness on the Edge of Town | 13/5/13 | 1.31m |
| 1.23 | Sacrifice (Season Finale) | 20/5/13 | 1.30m |
| Season 2 | |||
| 2.01 | City of Heroes | 21/10/13 | 1.06m |
| 2.02 | Identity | 21/10/13 | 0.97m |
| 2.03 | Broken Dolls | 28/10/13 | 1.01m |
| 2.04 | Crucible | 4/11/13 | 1.15m |
| 2.05 | League of Assassins | 11/11/13 | 1.19m |
| 2.06 | Keep Your Enemies Closer | 18/11/13 | 1.10m |
| 2.07 | State v Queen | 25/11/13 | 1.03m |
| 2.08 | The Scientist | 9/12/13 | 1.17m |
| 2.09 | Three Ghosts | 16/11/13 | 1.14m |
| 2.10 | Blast Radius | 20/2/14 | 0.94m |
| 2.11 | Blind Spot | 27/2/14 | 0.82m |
| 2.12 | Tremors | 6/3/14 | 0.86m |
| 2.13 | Heir to the Demon | 13/3/14 | 0.90m |
| 2.14 | Time of Death | 20/3/14 | 0.80m |
| 2.15 | The Promise | 27/3/14 | 0.83m |
| 2.16 | Suicide Squad | 3/4/14 | 0.92m |
| 2.17 | Birds of Prey | 10/4/14 | 0.92m |
| 2.18 | Deathstroke | 17/4/14 | 0.79m |
| 2.19 | The Man Under The Hood | 24/4/14 | 0.98m |
| 2.20 | Seeing Red | 1/5/14 | 0.85m |
| 2.21 | City of Blood | 8/5/14 | 0.83m |
| 2.22 | Streets of Fire | 15/5/14 | 0.93m |
| 2.23 | Unthinkable (Season Finale) | 22/5/14 | 0.84m |
| Season 3 | |||
| 3.01 | The Calm | 30/10/14 | 1.04m |
| 3.02 | Sara | 6/11/14 | 0.85m |
| 3.03 | Corto Maltese | 13/11/14 | 1.07m |
| 3.04 | The Magician | 20/11/14 | 0.96m |
| 3.05 | The Secret Origin of Felicity Smoak | 27/11/14 | 1.00m |
| 3.06 | Guilty | 4/12/14 | 0.77m |
| 3.07 | Draw Back Your Bow | 11/12/14 | 0.86m |
| 3.08 | The Brave and the Bold | 18/12/14 | 1.04m |
| 3.09 | The Climb | 18/12/14 | 0.80m |
| 3.10 | Left Behind | 12/2/15 | 1.03m |
| 3.11 | Midnight City | 19/2/15 | 0.84m |
| 3.12 | Uprising | 26/2/15 | 1.02m |
| 3.13 | Canaries | 5/3/15 | 1.03m |
| 3.14 | The Return | 12/3/15 | 0.86m |
| 3.15 | Nanda Parbat | 19/3/15 | 0.88m |
| 3.16 | The Offer | 26/3/15 | 0.89m |
| 3.17 | Suicidal Tendencies | 2/4/15 | 0.78m |
| 3.18 | Public Enemy | 9/4/15 | 0.73m |
| 3.19 | Broken Arrow | 16/4/15 | 0.71m |
| 3.20 | The Fallen | 23/4/15 | 0.75m |
| 3.21 | Al Sah-Him | 30/4/15 | 0.89m |
| 3.22 | This Is Your Sword | 7/5/15 | 0.82m |
| 3.23 | My Name Is Oliver Queen (Season Finale) | 14/5/15 | 0.84m |
| Season 4 | |||
| 4.01 | Green Arrow | 14/10/15 | 1.11m |
| 4.02 | The Candidate | 21/10/15 | 1.12m |
| 4.03 | Restoration | 28/10/15 | 1.02m |
| 4.04 | Beyond Redemption | 4/11/15 | 1.01m |
| 4.05 | Haunted | 11/11/15 | 0.94m |
| 4.06 | Lost Souls | 18/11/15 | 1.01m |
| 4.07 | Brotherhood | 25/11/15 | 1.03m |
| 4.08 | Legends of Yesterday | 9/12/15 | 1.13m |
| 4.09 | Dark Waters | 16/12/15 | 0.78m |
| 4.10 | Blood Debts | 2/3/16 | TBA |
| 4.11 | A.W.O.L. | 9/3/16 | TBA |
| 4.12 | Unchained | 16/3/16 | TBA |
| 4.13 | Sins of the Father | 23/3/16 | TBA |
| 4.14 | Code of Silence | 30/3/16 | TBA |
| 4.15 | Taken | 6/4/16 | TBA |
| 4.16 | Broken Hearts | 13/4/16 | TBA |
| 4.17 | Beacon of Hope | 20/4/16 | TBA |
| 4.18 | Eleven-Fifty-Nine | 27/4/16 | TBA |
| 4.19 | Canary Cry | 4/5/16 | TBA |
| 4.20 | Genesis | 11/5/16 | TBA |
| 4.21 | Monument Point | 18/5/16 | TBA |
| 4.22 | Lost in the Flood | 25/5/16 | TBA |
| 4.23 | Schism (Season Finale) | 1/6/16 | TBA |
| Season 5 | |||
| 5.01 | Legacy | TBA | TBA |
*=Assumed air date.
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