Mike's grandfather is also Evie's grandfather. Evie calls him "our grandfather" when discussing his journal in part 2 of episode 18 called the Wizard's Treasure.
It is unclear if he is the father of Martha or of Mike's father.
Ad blocker interference detected!
Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers
Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.