 Peter Weller , who later appeared in Star Trek Into Darkness ( 2013 ) , guest starred as John Frederick Paxton , and other guest stars included Harry Groener , who had previously appeared in episodes of both The Next Generation and Voyager . Filming of the episode overlapped with that of several other episodes , and sets included both the standing sets and an alleyway on the Paramount lot which was previously used in the Deep Space Nine episode " Little Green Men " . The critical response to the episode was mostly positive with one reviewer stating that the two @-@ parter posed similar ideological questions to those seen in The Original Series . 
