Professor Layton and the Relics Treasure: Episode 5 is the 49th episode of Layton Mystery Detective Agency: Kat's Mystery-Solving Files.
In the wake of having located Luke and the Professor, Katrielle's investigatory instincts refuse to let her rest, compelling the team to follow the trail of the mysterious "Aldebaran" to his palatial home.
- Katrielle Layton
- Ernest Greeves
- Professor Hershel Layton
- Luke Triton
- Marina Triton
- Chief Inspector Royall Britannias