After a letter bomb is delivered to an office, the manager thinks it to be a hoax. Grace thinks though that it could be the beginning of something a lot more sinister though. Callum finds out that the manager's brother is involved when then the equipment to make the bomb is found at his house.
| Name | Type | Role | |
|---|---|---|---|
| Steve Bailie | Writer | ||
| Karl Neilson | Director |