Throughout his life, William Wilson finds himself being shadowed by another William Wilson, who seems to resemble him in more than name.
| Actor | Role |
|---|---|
 Norman EshleyWilliam Wilson | William Wilson |
 Stephen MurrayDr. Bransby | Dr. Bransby |
| MMatthew StonesWilliam Wilson (as a schoolboy) | William Wilson (as a schoolboy) |
| CCharles SpicerWilliam Wilson (at Eton) | William Wilson (at Eton) |
| TThomas BulmanAshcroft | Ashcroft |
| PPeter DeminPargeter | Pargeter |
 Anthony DanielsGlendinning | Glendinning |