 Most of the filming for the second half of the episode wasn 't on the standing sets . Scenes were shot elsewhere , including on site shooting at Griffith Park , which had previously been used in the Voyager episode " Future 's End " . Other locations used included the re @-@ dressed Paramount backlot , as well as an alleyway elsewhere on the same site . A night shoot was required for a firefight sequence featuring explosions and stunt work . Additional post production work was required to show Silik 's shapeshifting , although Fleck appeared in a number of scenes without the prosthetics he normally wears for that role . 
