Jack was Gielinor's first wizard and the inventor of fire strike. He is the son of Laura and Roger, and has a sister by the name of Sarah.
In "Past A", Jack is a child playing by a fire pit with a Fire rune and an Air rune.
Jack says he will grow up to be a great druid, and will help the world by making it rain chocolate cakes and strawberry milk.
In "Past B", Jack is an adult and players find out he is not a druid but a wizard, and the founder of the Wizards' Guild.
He will tell you that he was taught magic by Misalionar, one of the first druids to inhabit Gielinor. Misalionar was a servant of Guthix during the First Age.
- When you complete Meeting History and talk to Jack in Past A he says he created Fire Strike.
- Jack is also the founder of the Wizards' Guild. This is said when you help Jack and go back to talk to him in the Part B section of Time. The inspiration of which he talks of is you (your character) for talking to him in Part A.
- In the alternate timeline in which the player was never born (and therefore never inspired Jack to become a druid), Jack grew up to be a wicked sorcerer-druid that terrorised the citizens of Gielinor until his rampage was stopped by Guthix himself, who ended up killing him. This caused Seren to leave Gielinor, and therefore caused Zaros to never arrive, as he was attracted to Gielinor because Seren was on it.