Who is Gordon Sims? (S01E18)

S01E01 Boardwalk Empire S01E01 Pilot (1) S01E02 The Ivory Tower S01E02 Pilot (2) S01E03 Broadway Limited S01E03 Les On a Ledge S01E04 Anastasia S01E04 Hoodlum Rock S01E05 Nights in Ballygran S01E05 Hold-Up S01E06 Bailey's Show S01E06 Family Limitation S01E07 Turkeys Away S01E07 Home S01E08 Love Returns S01E08 Hold Me in Paradise S01E09 Mama's Review S01E09 Belle Femme S01E10 The Emerald City S01E10 A Date With Jennifer S01E11 Paris Green S01E11 The Contest Nobody Could Win S01E12 A Return to Normalcy S01E12 Tornado S01E13 Goodbye, Johnny S01E14 Johnny Comes Back S01E15 Never Leave Me, Lucille S01E16 I Want to Keep My Baby S01E17 A Commercial Break S01E18 Who is Gordon Sims? S01E19 I Do, I Do... For Now S01E20 Young Master Carlson S01E21 Fish Story S01E22 Preacher