▁threat ens ▁to ▁take ▁his ▁evidence ▁to ▁the ▁media , ▁thereby ▁ru ining ▁both ▁their ▁political ▁asp ir ations . ▁S inc la ir ▁dec ides ▁to ▁have ▁Mac ▁cleared ▁of ▁all ▁charges ▁and ▁the ▁In ternal ▁Affairs ▁investigation ▁dis cont in ued , ▁and ▁Mac ▁remains ▁quiet ▁about ▁his ▁knowledge . ▁ ▁During ▁his ▁trip ▁to ▁England , ▁Mac ▁seems ▁to ▁be ▁st alk ed ▁by ▁person ▁or ▁persons ▁unknown ; ▁he ▁starts ▁receiving ▁anonymous ▁phone ▁calls ▁( most ▁of ▁which ▁are ▁silent , ▁though ▁some ▁are ▁very ▁short ▁messages ▁from ▁an ▁un ident ified ▁caller ) ▁from ▁a ▁phone ▁extension ▁of ▁ 3 3 3 ▁at ▁ 3 : 3 3 ▁am ; ▁the ▁calls ▁continue ▁after ▁he ▁gets ▁back ▁to ▁New ▁York . ▁It ▁appears ▁that ▁who ever ▁is ▁st alk ing ▁Mac ▁seems ▁to ▁know ▁him ▁int imately , ▁as ▁the ▁calls ▁keep ▁coming ▁despite ▁him ▁transfer ring ▁to ▁another ▁hotel ▁and ▁changing ▁his ▁cell ▁phone ▁number . ▁ ▁During ▁ 4 . 0 9 ▁" One ▁Wed ding ▁and ▁a ▁Fun eral ", ▁Mac ▁disco vers , ▁that ▁the ▁ 3 3 3 ▁caller ▁has ▁been ▁st alk ing ▁him ▁for ▁some ▁time , ▁and ▁at ▁the ▁end , ▁a ▁three - dimensional ▁puzz le ▁of ▁his ▁first ▁case ▁and ▁first ▁a partment ▁in ▁NY C ▁leads ▁him ▁to ▁where ▁he ▁got ▁engaged ▁in ▁NY C . ▁There ▁he ▁finds ▁another ▁puzz le ▁with ▁a ▁stone ▁leading ▁him ▁to ▁a ▁building ▁back ▁in ▁Chicago . ▁Mac ▁also ▁tests