Nearly one in two of us will be diagnosed with cancer at some point in our lives. David Nicholas Wilkinson is one of them, twice over. 1 in 2 follows Wilkinson through his own treatment, where he discovers a steep rise in bowel cancer among people far too young to be screened for it, and far too young, it seems, to be believed.
| Actor | Role |
|---|---|
 David WilkinsonSelf | Self |
| LLaura LeeSelf | Self |
| AAmaryllis RobertsSelf | Self |
| DDavid BurkeSelf | Self |
| SSada HamiltonSelf | Self |
| DDale VimalachandranSelf | Self |
| EEdwina ForkinSelf | Self |
 Slaine KellySelf | Self |
| IIain MacleodSelf | Self |
| MMillie TannerSelf | Self |
| RRenee ShawcroftSelf | Self |
| SSeamus MartinSelf | Self |
| JJonathan MargolisSelf | Self |
 James Van Der BeekNot listed | Not listed |
 Chadwick BosemanNot listed | Not listed |
 Miriam MargolyesNot listed | Not listed |