Mystery 101: Deadly History is a 2021 Hallmark Channel original movie directed by Stacey N. Harding starring Kristoffer Polaha, Robin Thomas and Jill Wagner. The film premiered on August 1, 2021.
Lead roles are shown in bold.
| Actor | Role |
|---|---|
| Kristoffer Polaha | Detective Travis Burke |
| Robin Thomas | Graham Winslow |
| Jill Wagner | Professor Amy Winslow |
| Peter Benson | Al Winslow |
| Miranda Edwards | Maria Valdez |
| Jason Cermak | Marc Lyons |
| Françoise Yip | Carmela Rhee |
| Rhinnan Payne | Lucy Harding |
| Lauren Bradley | Deputy Gail Patrick |
| Emma Grabinsky | Janey Sullivan |
| Iris Quinn | Eleanor Kent |
| Alison Araya | Jennifer Espinosa |
| Lorne Cardinal | Sheriff Ridgeway |
| Elizabeth McLaughlin | Dean Watkins |
| Charles Zuckermann | Frank Sullivan |
| Jenn MacLean-Angus | Sinead Sullivan |
| Carlo Fortin | Security Officer |
| Michael Denis | Olly Kent |
| Characters | Lee Goldberg |
| Writer | John Christian Plummer |
| Characters | Robin Bernheim Burger |
| Director | Stacey N. Harding |