| 1 | Lost in Space: Season 1 Main Title | John Williams | 0:59 |
| 2 | The Reluctant Stowaway: Smith's Entrance | John Williams | 2:48 |
| 3 | The Reluctant Stowaway: Final Countdown | John Williams | 4:45 |
| 4 | The Reluctant Stowaway: Escape Velocity / Robot Control / Meteor Storm / Defrosting | John Williams | 5:44 |
| 5 | The Reluctant Stowaway: Weightless Waltz | John Williams | 3:39 |
| 6 | The Reluctant Stowaway: Monster Rebels | John Williams | 3:43 |
| 7 | The Reluctant Stowaway: Walk in Space / To Be Continued | John Williams | 7:40 |
| 8 | The Reluctant Stowaway: Strange Planet / John's Descent | John Williams | 1:32 |
| 9 | Island in the Sky: Helmet It | John Williams | 1:21 |
| 10 | Island in the Sky: Strangle Hold / Landing | John Williams | 6:26 |
| 11 | Island in the Sky: Lil' Will and the Robot | John Williams | 1:32 |
| 12 | Island in the Sky: Search for John | John Williams | 4:15 |
| 13 | Island in the Sky: Monkey's Doo | John Williams | 4:54 |
| 14 | Island in the Sky: Operation Rescue | John Williams | 1:18 |
| 15 | Island in the Sky: Personal Chauffeur / Electric Sagebrush / Will Is Threatened | John Williams | 1:18 |
| 16 | The Hungry Sea: Earthquake | John Williams | 1:46 |
| 17 | The Hungry Sea: Temperature Rising / Boring Company / Don's Rays | John Williams | 2:47 |
| 18 | The Hungry Sea: Warming Rays / Sun Storm | John Williams | 3:00 |
| 19 | The Hungry Sea: Land Ho / Kid's Play-Off | John Williams | 2:36 |
| 20 | The Hungry Sea: Wonderland Discovery / Penny's Problem / Gathering Wild Flowers | John Williams | 9:33 |
| 21 | My Friend Mr. Nobody: New Galaxy | John Williams | 2:26 |
| 22 | My Friend Mr. Nobody: Lost in Space: Season I End Title | John Williams | 0:50 |