| Steve Buscemi | Enoch 'Nucky' Thompson [SS] | Udo Schenk |
| Kelly Macdonald | Margaret Schroeder [SS] | Nicole Hannak |
| Michael Pitt | James 'Jimmy' Darmody [SS] | Nico Sablik |
| Stephen Graham | Al Capone [SS] | Olaf Reichmann |
| Michael Shannon | Agent Nelson Van Alden [SS] | Markus Pfeiffer |
| Shea Whigham | Elias 'Eli' Thompson [SS] | Michael Iwannek |
| Michael Kenneth Williams | Chalky White [SS] | Thomas Petruo |
| Wrenn Schmidt | Julia Sagorsky [LE] | Emily Behr |
| Christiane Seidel | Sigrid Mueller [SSR] | |
| Erin Dilly | Eleanor Thompson [SSR] | Sonja Tièschky |
| Vic Bagratuni | Lead Union Speaker [SR] | |
| Kerstin Julia Dietrich | Onyx Dancer (1. Folge / 4. Staffel) [SR] | |
| Brian Haley | Lead Guard [SRE] | Sven Brieger |
