Sinister Tales of Terror! Issue 12
From Tardis Wiki, the free Doctor Who reference
The twelfth issue of Sinister Tales of Terror cost 50p, and featured the character Obadiah Grimm. The cover depicted the character attacking a woman, and featured the tagline, "Obadiah Grimm, his touch means death!"
Walter owned a copy of this issue, from which his hallucinations of Grimm were fuelled. (COMIC: Be Forgot)