| Name | Character | Episodes |
|---|---|---|
| John Hensley | Luke Madigan | 12 |
| Grant Shaud | Alex Rosetti | 12 |
| Gabriel Byrne | Benjamin Madigan | 12 |
| Roy Dotrice | Seamus Madigan | 12 |
| Sabrina Lloyd | Wendy Lipton | 12 |
| George Wendt | 4 | |
| Margaret Colin | 2 | |
| Milo O’Shea | 2 | |
| Jaclyn DeSantis | 2 | |
| Kate Mara | 1 | |
| Charlie Day | 1 | |
| Clea Lewis | 1 | |
| Judy Reyes | 1 | |
| Rebecca Mader | 1 | |
| Lisa Emery | 1 | |
| Haviland Morris | 1 | |
| Michael Ealy | 1 | |
| Christine Ebersole | 1 | |
| John Randolph | 1 | |
| Mel Harris | 1 | |
| Alexandra Neil | 1 | |
| Robert Peters | 1 | |
| Erin Cardillo | 1 | |
| Veanne Cox | 1 | |
| David Eigenberg | 1 | |
| Isiah Whitlock, Jr. | 1 | |
| Doris Belack | 1 | |
| Angela Goethals | 1 | |
| Rick D. Wasserman | 1 | |
| Daniel McDonald | 1 | |
| Frederick Weller | 1 | |
| Susan Floyd | 1 | |
| Sarah Thompson | 1 | |
| Timm Sharp | 1 | |
| Chip Zien | 1 | |
| Scotty Bloch | 1 |