The CD player guy is not Dennis. And if you want Fooruman's abilities, just look back to the last time they were listed.
"Well I say - then one think we should jolly well goh see dennis," you say, "Could you, one's old bean, please take us to him? We have ah daaarrrling lost in the underground caverns and would hairlairh fancy to rescue hah. Absolutely top hole - I have to say."
"Yah can't leave nohw, deaaars. Ye fie got here not long agoh!" Mary says, then turning to Fooruman to talk more about his "arcane powers". You feel strangely urged to comply.
"L33tz44hn," you manage to whisper to L33tz4n, "use your hypnotism waaard."
She looks back at you, smiling. "I'm terribly sorry but we fie got here. Caaare for ah cup of teah?"