during his time on the show, dennis repeatedly clashed with sharon's ex-boyfriend phil mitchell (steve mcfadden); formed a mutual friendship with dalton's representative andy hunter (michael higgs); bonded with his half-sister vicki fowler (scarlett alice johnson); embarked on a relationship with his siblings' close friend zoe slater (michelle ryan); developed a warm compaionship with local gossip dot cotton (june brown); and temporarily became enemies with phil's brother grant (ross kemp), who previously married sharon, until the pair worked together to help the mitchell family bring sharon's stepmother chrissie (tracy ann oberman) to justice for killing den and framing phil's sister sam (kim medcalf) for his murder. towards the end of 2005, dennis got embroiled in a feud with andy's murderer and gangland successor johnny allen (billy murray) - which came to an unfortunate end when dennis attacked johnny for threatening sharon and killing andy, an act which prompted johnny to arrange his henchman danny moon (jake maskall) to kill dennis in revenge; dennis was later stabbed on that night and he consequently died in sharon's arms.