In the United Kingdom, The 100 is shown on E4.
BARB, the official organisation that compiles television ratings, typically releases viewing figures 2-3 weeks after initial airdate.[1]
Season One[]
Aired Mondays at 9pm, starting with the Pilot on July 7th, 2014.
| No. | Episode | Airdate | U.K. Viewers (in millions) | Difference | E4 Weekly Rank |
|---|---|---|---|---|---|
| 1 | Pilot | July 7th, 2014 | 2.05 | N/A | #1 |
| 2 | Earth Skills | July 14th, 2014 | 1.75 | 0.30 ↓ | #1 |
| 3 | Earth Kills | July 21st, 2014 | 1.62 | 0.13 ↓ | #1 |
| 4 | Murphy's Law | July 28th, 2014 | 1.54 | 0.08 ↓ | #1 |
| 5 | Twilight's Last Gleaming | August 4th, 2014 | 1.41 | 0.13 ↓ | #1 |
| 6 | His Sister's Keeper | August 11th, 2014 | 1.37 | 0.04 ↓ | #1 |
| 7 | Contents Under Pressure | August 18th, 2014 | 1.31 | 0.06 ↓ | #1 |
| 8 | Day Trip | August 25th, 2014 | 1.32 | 0.01 ↑ | #1 |
| 9 | Unity Day | September 1st, 2014 | 1.30 | 0.02 ↓ | #1 |
| 10 | I Am Become Death | September 8th, 2014 | 1.36 | 0.06 ↑ | #1 |
| 11 | The Calm | September 15th, 2014 | 1.26 | 0.10 ↓ | #1 |
| 12 | We Are Grounders (Part 1) | September 22nd, 2014 | 1.27 | 0.01 ↑ | #1 |
| 13 | We Are Grounders (Part 2) | September 29th, 2014 | 1.19 | 0.08 ↓ | #1 |
Season Two[]
Aired on Tuesday at 9pm, starting with The 48 on January 6th, 2015.
| No. | Episode | Airdate | U.K. Viewers (in millions) | Difference | E4 Weekly Rank |
|---|---|---|---|---|---|
| 1 | The 48 | January 6th, 2015 | 1.39 | 0.20 ↑ | #1 |
| 2 | Inclement Weather | January 13th, 2015 | 1.09 | 0.30 ↓ | #2 |
| 3 | Reapercussions | January 20th, 2015 | 0.91 | 0.18 ↓ | #7 |
| 4 | Many Happy Returns | January 27th, 2015 | 1.03 | 0.12 ↑ | #1 |
| 5 | Human Trials | February 3rd, 2015 | 0.96 | 0.07 ↓ | #2 |
| 6 | Fog of War | February 10th, 2015 | 1.34 | 0.38 ↑ | #1 |
| 7 | Long Into an Abyss | February 17th, 2015 | 1.27 | 0.07 ↓ | #1 |
| 8 | Spacewalker | February 24th, 2015 | 1.24 | 0.03 ↓ | #1 |
| 9 | Remember Me | March 3rd, 2015 | 1.22 | 0.02 ↓ | #1 |
| 10 | Survival of the Fittest | March 10th, 2015 | 1.21 | 0.01 ↓ | #1 |
| 11 | Coup de Grâce | March 17th, 2015 | 1.10 | 0.11 ↓ | #2 |
| 12 | Rubicon | March 24th, 2015 | 1.14 | 0.04 ↑ | #2 |
| 13 | Resurrection | March 31st, 2015 | 1.16 | 0.02 ↑ | # |
| 14 | Bodyguard of Lies | March 7th, 2015 | TBA | # | |
| 15 | Blood Must Have Blood (Part 1) | March 14th, 2015 | TBA | # | |
| 16 | Blood Must Have Blood (Part 2) | March 21st, 2015 | TBA | # |
Season Three[]
| No. | Episode | Airdate | U.K. Viewers (in millions) | Difference |
|---|---|---|---|---|
| 1 | Wanheda (Part 1) | |||
| 2 | Wanheda (Part 2) | |||
| 3 | Ye Who Enter Here | |||
| 4 | Watch the Thrones | |||
| 5 | Hakeldama | |||
| 6 | Bitter Harvest | |||
| 7 | Thirteen | |||
| 8 | Terms and Conditions | |||
| 9 | Stealing Fire | |||
| 10 | Fallen | |||
| 11 | Nevermore | |||
| 12 | Demons | |||
| 13 | Join or Die | |||
| 13 | Red Sky at Morning | |||
| 13 | Perverse Instantiation (Part 1) | |||
| 13 | Perverse Instantiation (Part 2) |
Season Four[]
| No. | Episode | Airdate | U.K. Viewers (in millions) | Difference |
|---|---|---|---|---|
| 1 | Echoes | |||
| 2 | Heavy Lies the Crown | |||
| 3 | The Four Horsemen | |||
| 4 | A Lie Guarded | |||
| 5 | ||||
| 6 | ||||
| 7 | ||||
| 8 | ||||
| 9 | ||||
| 10 | ||||
| 11 | ||||
| 12 | ||||
| 13 |