Harper talks to Ali about how he and Wanda adopted a baby boy, David, then learned she was pregnant. Harper's two daughters become focal points in following episodes, but his son is never mentioned again.
This is the first episode of a 13 episode arc focusing on the Ambleton murders. It was the first time Cold Squad developed an entire season arc and didn't continue this format beyond this season.
Starring cast for season five: Julie Stewart, Tamara Craig Thomas, Gregory Calpakis, Matthew Bennett, Joely Collins and Garry Chalk.