| 1 | Katrielle's Detective Agency |
| 2 | Professor Layton's Theme (TV Anime Version) |
| 3 | Katrielle's Daily Life ~ Happy |
| 4 | Katrielle's Daily Life ~ Humorous |
| 5 | Katrielle's Daily Life ~ Relaxed |
| 6 | Katrielle's Daily Life ~ Slapstick |
| 7 | Katrielle's Daily Life ~ Lonely |
| 8 | Katrielle's Daily Life ~ Inquisitive |
| 9 | Katrielle's Daily Life ~ Gentle |
| 10 | Katrielle's Daily Life ~ Leisurely |
| 11 | Katrielle's Daily Life ~ Walking |
| 12 | Client A ~ An Incident Occurs |
| 13 | Client B ~ An Incident Occurs |
| 14 | Jaunty Bustle |
| 15 | Suspicion & Ratiocination |
| 16 | The Solution |
| 17 | Truth-Seeking |
| 18 | The Confession |
| 19 | Angry People |
| 20 | London Morning |
| 21 | London Daytime |
| 22 | London Night |
| 23 | Elizabeth's Tower |
| 24 | The British Museum |
| 25 | Downtown at Night |
| 26 | Dance of Joy |
| 27 | Frolic |
| 28 | Cute Buddy |
| 29 | How About Some Tea? |
| 30 | Cop Jazz |
| 31 | Analysis |
| 32 | Cello Solo |
| 33 | Lullaby Melody |
| 34 | Ratman Rag (TV Anime Version) |
| 35 | The Seven Dragons (TV Anime Version) |
| 36 | Theme from Thametanic (TV Anime Version) |
| 37 | The Goddess of the Thames |
| 38 | Luxurious Mansion |
| 39 | There's an Answer |
| 40 | Dangerous Chase |
| 41 | Run Away |
| 42 | Hard Reality |
| 43 | Sprint to the Solution |
| 44 | Another Truth |
| 45 | Heart-Pounding |
| 46 | The Impact |
| 47 | The Showdown |
| 48 | Important Request |
