8.14 avg 8 episodes 8.0 → 8.3 45 min avg
| # | Title | Rating | Votes |
|---|---|---|---|
| 1 | Is There a Creator? | 8.0 | 390 |
| 2 | The Riddle of Black Holes | 8.3 | 294 |
| 3 | Is Time Travel Possible? | 8.2 | 281 |
| 4 | What Happened Before the Beginning? | 8.3 | 260 |
| 5 | How Did We Get Here? | 8.0 | 220 |
| 6 | Are We Alone? | 7.9 | 223 |
| 7 | What Are We Really Made Of? | 8.1 | 208 |
| 8 | Beyond the Darkness | 8.3 | 210 |
7.82 avg 10 episodes 7.6 → 7.5 44 min avg
| # | Title | Rating | Votes |
|---|---|---|---|
| 1 | Is There Life After Death? | 7.6 | 201 |
| 2 | Is There an Edge to the Universe? | 8.2 | 181 |
| 3 | Does Time Really Exist? | 8.2 | 190 |
| 4 | Are There More Than 3 Dimensions? | 7.8 | 156 |
| 5 | Is There a Sixth Sense? | 7.6 | 162 |
| 6 | Are There Parallel Universes? | 7.9 | 160 |
| 7 | How Does the Universe Work? | 7.8 | 145 |
| 8 | Can We Travel Faster Than Light? | 8.0 | 158 |
| 9 | Can We Live Forever? | 7.6 | 160 |
| 10 | What Do Aliens Look Like? | 7.5 | 141 |
7.32 avg 10 episodes 7.3 → 7.6 45 min avg
| # | Title | Rating | Votes |
|---|---|---|---|
| 1 | Will We Survive First Contact? | 7.3 | 140 |
| 2 | Is There a Superior Race? | 7.3 | 134 |
| 3 | Is the Universe Alive? | 7.1 | 129 |
| 4 | What Makes Us Who We Are? | 7.2 | 118 |
| 5 | What Is Nothing? | 7.3 | 117 |
| 6 | Can We Resurrect the Dead? | 7.3 | 111 |
| 7 | Can We Eliminate Evil? | 7.4 | 103 |
| 8 | Mysteries of the Subconscious | 7.4 | 117 |
| 9 | Will Eternity End? | 7.3 | 105 |
| 10 | Did We Invent God? | 7.6 | 125 |