Who sometimes known under the pseudonym "Designer X",  Callie Thorne or Greg Costikyan ?
Callie Thorne Calliope "Callie" Thorne (born November 20, 1969) is an American actress known for her role as Dr. Dani Santino on the USA Network series "Necessary Roughness". She is also known for past work such as her roles on "" as Detective Laura Ballard, a role she held for two seasons, and the movie "", as well as for playing Sheila Keefe on "Rescue Me" and Elena McNulty in "The Wire".
Art Chantry Arthur Samuel Wilbur Chantry II (born April 9, 1954 in Seattle) is a graphic designer often associated with the posters and album covers he has done for bands from the Pacific Northwest, such as Mudhoney, Mono Men, Soundgarden and The Sonics.