 " We 'll Always Have Paris " is named in reference to the Humphrey Bogart and Ingrid <unk> film Casablanca . As well as the title of the episode and the love triangle in the story , the Blue Parrot <unk> from the film is directly mentioned by Captain Picard . Casablanca was also the basis for the earlier Star Trek : The Original Series novel The <unk> <unk> , and would be so again in the Deep Space Nine episode " <unk> and Loss " . 
