Season 1
| Ep # | Production Code | Air Date | エピソードタイトル | |
| 原題 | 邦題 | |||
| 1 | 100 | 04/09/22 | Pilot Part 1 | 墜落 |
| 2 | 04/09/29 | Pilot Part 2 | SOS | |
| 3 | 101 | 04/10/06 | Tabula Rasa | 眠れぬ夜 |
| 4 | 102 | 04/10/13 | Walkabout | 運命 |
| 5 | 103 | 04/10/20 | White Rabbit | 責任 |
| 6 | 104 | 04/10/27 | House of the Rising Sun | 閉ざされた心 |
| 7 | 105 | 04/11/03 | The Moth | 暗闇の中で |
| 8 | 106 | 04/11/10 | Confidence Man | 手紙 |
| 9 | 107 | 04/11/17 | Solitary | 孤独の人 |
| 10 | 108 | 04/12/01 | Raised By Another | 予言 |
| 11 | 109 | 04/12/08 | All the Best Cowboys Have Daddy Issues | 見えない足跡 |
| 12 | 110 | 05/01/05 | Whatever the Case May Be | ケースの中の過去 |
| 13 | 111 | 05/01/12 | Hearts And Minds | 絆 |
| 14 | 112 | 05/01/19 | Special | 運命の子 |
| 15 | 113 | 05/02/09 | Homecoming | 守るべきもの |
| 16 | 114 | 05/02/16 | Outlaws | 最期の言葉 |
| 17 | 115 | 05/02/23 | ...In Translation | 沈黙の陰 |
| 18 | 116 | 05/03/02 | Numbers | 数字 |
| 19 | 117 | 05/03/30 | Deus Ex Machina | 啓示 |
| 20 | 118 | 05/04/06 | Do No Harm | 約束 |
| 21 | 119 | 05/05/04 | The Greater Good | 悲しみの記憶 |
| 22 | 120 | 05/05/11 | Born to Run | タイムカプセル |
| 23 | 121 | 05/05/18 | Exodus Part 1 | 迫りくる脅威 |
| 24 | 122 | 05/05/25 | Exodus Part 2 | 暗黒地帯 |
| 25 | 123 | 漆黒の闇 | ||
Season 2
| Ep # | Production Code | Air Date | エピソードタイトル | |
| 原題 | 邦題 | |||
| 1 | 201 | 05/09/21 | Man of Science, Man of Faith | 闇の底 |
| 2 | 202 | 05/09/28 | Adrift | 漂流 |
| 3 | 203 | 05/10/05 | Orientation | 信じる者 |
| 4 | 204 | 05/10/12 | Everybody Hates Hugo | 憂鬱な仕事 |
| 5 | 205 | 05/10/19 | ...And Found | 探しもの |
| 6 | 206 | 05/11/09 | Abandoned | さまよう者 |
| 7 | 207 | 05/11/16 | The Other 48 Days | 知られざる48日間 |
| 8 | 208 | 05/11/23 | Collison | 復讐 |
| 9 | 209 | 05/11/30 | What Kate Did | 彼女の事情 |
| 10 | 210 | 06/01/11 | The 23rd Psalm | 詩篇23章 |
| 11 | 211 | 06/01/18 | The Hunting Party | 境界線 |
| 12 | 212 | 06/01/25 | Fire + Water | 天使の言葉 |
| 13 | 213 | 06/02/08 | The Long Con | 詐欺の手口 |
| 14 | 214 | 06/02/15 | One of Them | 捕らえられた男 |
| 15 | 215 | 06/03/01 | Maternity Leave | 記憶の扉 |
| 16 | 216 | 06/03/22 | The Whole Truth | 秘密 |
| 17 | 217 | 06/03/29 | Lockdown | 封鎖 |
| 18 | 218 | 06/04/05 | Dave | 再会 |
| 19 | 219 | 06/04/12 | S.O.S. | 救済の地 |
| 20 | 220 | 06/05/03 | Two for the Road | 一丁の銃 |
| 21 | 221 | 06/05/10 | ? | 死者の伝言 |
| 22 | 222 | 06/05/17 | Three Minutes | 隠された取引 |
| 23 | 223 | 06/05/24 | Live Together, Die Alone | 旅路の果て |
| 24 | 224 | 破滅の刻 | ||
Season 3
| Ep # | Production Code | Air Date | エピソードタイトル | |
| 原題 | 邦題 | |||
| 1 | 301 | 06/10/04 | A Tale of Two Cities | 囚われた者たち |
| 2 | 302 | 06/10/11 | The Glass Ballerina | ガラスのバレリーナ |
| 3 | 303 | 06/10/18 | Further Instructions | 次なる導き |
| 4 | 304 | 06/10/25 | Every Man for Himself | 自らのために生きよ |
| 5 | 305 | 06/11/01 | The Cost of Living | 懺悔 |
| 6 | 306 | 06/11/08 | I Do | 誓い |
| 7 | 307 | 07/02/07 | Not in Portland | 偽りの場所 |
| 8 | 308 | 07/02/14 | Flashes Before Your Eyes | 軌道 |
| 9 | 309 | 07/02/21 | Stranger in a Strange Lad | 裁きの時 |
| 10 | 310 | 07/02/28 | Tricia Tanaka Is Dead | 希望 |
| 11 | 311 | 07/03/07 | Enter 77 | コード77 |
| 12 | 312 | 07/03/14 | Par Avion | 海を渡って |
| 13 | 313 | 07/03/21 | The Man from Tallahassee | 魔法の箱 |
| 14 | 314 | 07/03/28 | Expose | エクスポゼ |
| 15 | 315 | 07/04/04 | Left Behind | 二人の女 |
| 16 | 316 | 07/04/11 | One of Us | 新たな仲間 |
| 17 | 317 | 07/04/18 | Catch-22 | ジグソーパズル |
| 18 | 318 | 07/04/25 | D.O.C. | 受胎の日 |
| 19 | 319 | 07/05/02 | The Brig | 報い |
| 20 | 320 | 07/05/09 | The Man Behind the Curtain | 誕生 |
| 21 | 321 | 07/05/19 | Greatest Hits | グレイテストヒッツ |
| 22 | 322 | 07/05/23 | Through the Looking Glass | 決行 |
| 23 | 323 | 終わりの始まり | ||
Season 4
| Ep # | Production Code | Air Date | エピソードタイトル | |
| 原題 | 邦題 | |||
| 1 | 401 | 08/01/31 | Beginning of the End | 選択 |
| 2 | 402 | 08/02/07 | Confirmed Dead | 訪問者たち |
| 3 | 403 | 08/02/14 | The Economist | 雇われた男 |
| 4 | 404 | 08/02/21 | Eggtown | 証言 |
| 5 | 405 | 08/02/28 | The Constant | 定数 |
| 6 | 406 | 08/03/06 | The Other Woman | 許されぬ関係 |
| 7 | 407 | 08/03/13 | Ji Yeon | ジヨン |
| 8 | 408 | 08/03/20 | Meet Kevin Johnson | 贖罪 |
| 9 | 409 | 08/04/24 | The Shape of Things to Come | ルール |
| 10 | 410 | 08/05/01 | Something Nice Back Home | 父の影 |
| 11 | 411 | 08/05/08 | Cabin Fever | 奇跡の子 |
| 12 | 412 | 08/05/15 | There's No Place Like Home Part 1 | オーシャニック6 |
| 13 | 413 | 08/05/29 | There's No Place Like Home Part 2 | 基地オーキッド |
| 14 | 414 | 帰還 | ||
Season 5
| Ep # | Production Code | Air Date | エピソードタイトル | |
| 原題 | 邦題 | |||
| 1 | 501 | 09/01/21 | Because You Left | 責めを負う者 |
| 2 | 502 | The Lie | 嘘 | |
| 3 | 503 | 09/01/28 | Jughead | ジャグヘッド |
| 4 | 504 | 09/02/04 | The Little Prince | リトル・プリンス |
| 5 | 505 | 09/02/11 | This Place Is Death | 死の島 |
| 6 | 507 | 09/02/18 | 316 | 316 |
| 7 | 506 | 09/02/25 | The Life And Death of Jeremy Bentham | ジェレミー・ベンサムの生と死 |
| 8 | 508 | 09/03/04 | Lafluer | ラフルア |
| 9 | 509 | 09/03/18 | Namaste | ナマステ |
| 10 | 510 | 09/03/25 | He's Our You | 理由 |
| 11 | 511 | 09/04/01 | Whatever Happened, Happened | 未だ見ぬ過去 |
| 12 | 512 | 09/04/08 | Dead Is Dead | 島の裁き |
| 13 | 513 | 09/04/15 | Some Like It Hoth | 父という存在 |
| 14 | 514 | 09/04/29 | The Variable | 変数 |
| 15 | 515 | 09/05/06 | Follow the Leader | リーダー |
| 16 | 516 | 09/05/13 | The Incident | ジェイコブ |
| 17 | 517 | 運命の午後 | ||
Season 6
| Ep # | Production Code | Air Date | エピソードタイトル | |
| 原題 | 邦題 | |||
| 1 | 601 | 10/02/02 | LA X | LA X |
| 2 | 602 | テンプル | ||
| 3 | 603 | 10/02/09 | What Kate Does | 彼女の心情 |
| 4 | 604 | 10/02/16 | The Substitute | 代理 |
| 5 | 605 | 10/02/23 | Lighthouse | 灯台 |
| 6 | 606 | 10/03/02 | Sundown | 日没 |
| 7 | 607 | 10/03/09 | Dr. Linus | ライナス博士 |
| 8 | 608 | 10/03/16 | Recon | 偵察 |
| 9 | 609 | 10/03/23 | Ab Aeterno | 長く仕えし者 |
| 10 | 610 | 10/03/30 | The Package | パッケージ |
| 11 | 611 | 10/04/06 | Happily Ever After | 目覚めの時 |
| 12 | 612 | 10/04/13 | Everybody Loves Hugo | ヒューゴの導き |
| 13 | 613 | 10/04/20 | The Last Recruit | 合流 |
| 14 | 614 | 10/05/04 | The Candidate | 候補者 |
| 15 | 615 | 10/05/11 | Across the Sea | 白と黒 |
| 16 | 616 | 10/05/18 | What They Died For | すべてはこのために |
| 17 | 617 | 10/05/23 | The End | 終幕 －前編－ |
| 18 | 618 | 終幕 －後編－ | ||