 The exterior shots of the store where most of the episode takes place are of a former Mervyn 's store in the Fallbrook Mall in Canoga Park . Reginald VelJohnson guest stars , reprising his Die Hard role of Sergeant Al Powell , who is revealed to be Big Mike 's cousin . Michael Rooker also guest stars as long @-@ time hostage negotiator Frank Mauser and Jed Rees as Ned , the hostage taker . Tony Hale and Bonita Friedericy reprise their recurring roles of efficiency expert Emmett Milbarge and General Diane Beckman , respectively . 
