Canadian writer and producer John Callaghan is known for a variety of popular television series such as Sullivan's Crossing, Hudson and Rex, Wynonna Earp, Frankie Drake Mysteries and Republic of Doyle
| Episode |
Hudson & Rex Claws Out |
2023 |
| Episode |
Hudson & Rex Haunted by the Past |
2019 |
| Episode |
Hudson & Rex Trial and Error |
2019 |
| Episode |
Sullivan's Crossing Can't Help Falling |
2023 |
| Episode |
Hudson & Rex Manhunt |
2021 |
| Episode |
Hudson & Rex Rex, Drugs & Rock n' Roll |
2024 |
| Episode |
Remedy Tomorrow the Green Grass |
2014 |
| Episode |
Republic of Doyle Head Over Wheels |
2012 |
| Episode |
Hudson & Rex Mansion on a Hill |
2021 |
| Episode |
Wynonna Earp Let's Pretend We're Strangers |
2017 |
| Episode |
Wynonna Earp I See a Darkness |
2017 |
| Episode |
Sullivan's Crossing Pressure Drop |
2023 |
| Episode |
Remedy Quit the Horizon |
2014 |
| Episode |
Remedy Day One |
2015 |
| Episode |
Sullivan's Crossing Rock and a Hard Place |
2023 |
| Episode |
Saving Hope All Things Must Pass |
2013 |
| Episode |
Republic of Doyle The Tell-Tale Safe |
2010 |
| Episode |
Remedy Looking For Satellites |
2015 |
| Episode |
Sullivan's Crossing Remorse |
2024 |
| Episode |
Sullivan's Crossing Truth and Consequences |
2024 |
| Episode |
Republic of Doyle Two Jakes and a Baby |
2012 |
| Episode |
Remedy When You Awake |
2015 |