Nightmare Tour #231
| Series | Dylan Dog |
| Number | Vol. 1 #231 |
| Publisher | Sergio Bonelli Editore |
| Date | 2005-12 |
| Type | Comic Book, Softcover |
| Language | Italian |
| Cover Inker | Angelo Stano |
| Cover Penciler | Angelo Stano |
| Creator | Tiziano Sclavi |
| Editor In Chief | Mauro Marcheselli |
| Inker | Maurizio Di Vincenzo |
| Letterer | Diana Rocchi |
| Managing Director | Decio Canzio |
| Penciler | Maurizio Di Vincenzo |
| Writer | Pasquale Ruju |
| Copyright Holder | Sergio Bonelli Editore |
| Distributed By | A&G Marco |
| Printed By | Ilte s.p.a. |
| Genre | Horror |
| Published in | Italy |
| Pages | 98 |
| EAN | 9 771121 580009 50231 |
| Characters | Dylan Dog, Groucho, Inspector Bloch |
| Story Location | London |
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