 " Rosemary 's Baby " was mainly filmed on September 11 , 2007 , while Fisher 's scenes were filmed the next day on September 12 , 2007 . Star Wars is frequently referenced in 30 Rock , beginning with the pilot episode where Tracy Jordan is seen shouting that he is a <unk> . Liz Lemon admits to being a huge fan of Star Wars , saying that she had watched it many times with Pete <unk> , and dressed up as the Star Wars character Princess <unk> during four recent <unk> . Star Wars is also referenced when Tracy Jordan takes on the identity of the character <unk> . Fey , a fan of Star Wars herself , said that the weekly Star Wars joke or reference " started happening <unk> " when the crew realized that they had a Star Wars reference " in almost every show " . Fey said that from then on " it became a thing where [ they ] tried to keep it going " , and that even though they could not include one in every episode , they still had a " pretty high batting average " . Fey attributed most of the references to Robert Carlock , who she described as " the resident expert " . Prior to the airing of the episode , fans were " raving " about the much awaited guest appearance of Fisher . Fisher 's last line in the episode , " Help me , Liz Lemon ! You 're my only hope ! " , was a spoof of the line " Help me <unk> @-@ <unk> <unk> , you 're my only hope ! " from her past role in the original Star Wars trilogy , in which she played Princess <unk> . 
