Marcus Underwood is the father of Zack Underwood as well as the husband of Eileen Underwood.

Heroic Acts[]

• In "Murphy's Lard", a flashback featured Marcus warning Zack to not leave the fishing boat. A warning that Zack ignored.
• In "Time Out", Marcus and Martin went fishing with Milo and Zack and they ended up getting attacked by a wild swordfish, which they all defeated as a team.
• In "Backward to School Night", it was learned the hardship of Marcus' parenthood, when Zack had to take care of baby versions of himself and Eileen.