 The only exterior location used was an alleyway on the Paramount lot near the soundstages . The alley had previously been used as a location in the Deep Space Nine episode " Little Green Men " . Production moved to the Paramount Theatre on the final day of filming , which hosted the season premieres . It was used to portray the Assembly Hall of Starfleet Command . The footage of Colonel Green was shot later , with a greenscreen placed on the monitor during the filming with Weller . 
