Writer Tim Minear deliberately chose to make his blind protagonist Marty rather dislikeable as most interpretations of blind people tend to make them rather noble.
Mulder's line "even if the gloves do fit - you can still acquit", a reference to Johnnie L. Cochran Jr.'s argument in the O.J. Simpson trial, was improvised by David Duchovny during filming.
The producers were initially hesitant about approaching Lili Taylor about playing Marty, thinking she would be more interested in feature films. Little did they know that Taylor was a huge fan of the series and had in fact previously contacted the show's casting director, Rick Millikan, about any parts that might come up.