 The episode , which explores John Doggett 's backstory as a New York City police officer , was described as containing similar themes as those " explored on the Millennium series . " The episode guest @-@ starred Arthur Nascarella , who was a friend of series co @-@ star Robert Patrick . Patrick was essential in getting Nascarella cast on the show ; he later joked " I stole [ Nascarella 's ] New York accent in Copland [ sic ] and I stole it to do The X @-@ Files , but I got him cast in The X @-@ Files show . " 
 The episode , which <a href='uninflect' title='1'><mark>explores</mark></a> John Doggett <a href='null_genetive' title='2'><mark>'s</mark></a>backstory as a New York City police officer , was described as containing similar themes as those " explored on the Millennium series . " The episode guest @-@ starred Arthur Nascarella , <a href='null_relcl' title='3'><mark>who</mark></a>was a friend of series <a href='uninflect' title='4'><mark>co</mark></a> @-@ star Robert Patrick . Patrick was essential in getting Nascarella cast on the show ; he later joked " I stole [ Nascarella <a href='null_genetive' title='5'><mark>'s</mark></a>] New York accent in Copland [ sic ] and I stole it to do The X @-@ Files , but I got him cast in The X @-@ Files show . " 
Da episode , which explore John Doggett  backstory as a New York City police officer , was described as containing similar themes as those " explored on the Millennium series . " The episode guest @-@ starred Arthur Nascarella , was a friend of series coed @-@ star Robert Patrick . Patrick was essential in getn Nascarella cast on the show ; he later joked " I stole [ Nascarella  ] New York accent in Copland [ sic ] and I stole it to do TdaX @-@ Files , but I got him cast in Thda @-@ Files show . "