Vall's Paratime Police position is Special Assistant to the Chief of the Paratime Police, Tortha Karff's personal roving inspector. He serves as a general troubleshooter for Chief Tortha Karf and is assigned to cases that require special attention from the Paratime Police. In "Police Operation", he has to hunt down a Venusian night-hound that escaped onto our timeline; in "Temple Trouble", he must rescue Home Level paratimers from torture and execution; in "Last Enemy", he must locate researcher Hadron Dalla; and in "Time Crime", he is in charge of an investigation to track down a large criminal organization of slave traders. At the end of "Time Crime" Vall is promoted to Chief of Duplicate Paratime Police, a new system set up on Police Terminal to seek out and destroy large organized crime syndicates operating across Paratime like the Organization described in "Time Crime".