Episodes : Season 1
| # | Title | Aired | Central character | Theories |
|---|---|---|---|---|
| 1.24 | Exodus: Part 2 | 5-25-2005 | Charlie | 130 |
| 1.23 | Exodus: Part 1 | 5-18-2005 | Jin | 101 |
| 1.22 | Born to Run | 5-11-2005 | Kate | 65 |
| 1.21 | The Greater Good | 5-4-2005 | Claire | 63 |
| 1.20 | Do No Harm | 4-6-2005 | Jack | 70 |
| 1.19 | Deus Ex Machina | 3-30-2005 | John | 100 |
| 1.18 | Numbers | 3-2-2005 | Hurley | 113 |
| 1.17 | .. in Translation | 2-23-2005 | Sun, Jin | 62 |
| 1.16 | Outlaws | 2-16-2005 | Jack, Kate, Sawyer | 67 |
| 1.15 | Homecoming | 2-9-2005 | Claire | 60 |
| 1.14 | Special | 1-19-2005 | Walt, Michael | 73 |
| 1.13 | Hearts and Minds | 1-12-2005 | Boone | 63 |
| 1.12 | Whatever the Case May Be | 1-5-2005 | Kate | 63 |
| 1.11 | All the Best Cowboys Have Daddy Issues | 12-8-2004 | Jack | 92 |
| 1.10 | Raised by Another | 12-1-2004 | Claire | 104 |
| 1.9 | Solitary | 11-17-2004 | Sayid | 87 |
| 1.8 | Confidence Man | 11-10-2004 | Shannon | 67 |
| 1.7 | The Moth | 11-3-2004 | Charlie, Liam | 92 |
| 1.6 | House of the Rising Sun | 10-27-2004 | Sun, Jin | 89 |
| 1.5 | White Rabbit | 10-20-2004 | Jack | 144 |
| 1.4 | Walkabout | 10-14-2004 | John | 116 |
| 1.3 | Tabula Rasa | 10-6-2004 | Kate | 95 |
| 1.2 | Pilot, Part 2 | 9-29-2004 | Kate, Charlie | 205 |
| 1.1 | Pilot, Part 1 | 9-24-2004 | Jack | 363 |