Underhill is an archaeologist and a member of the Explorers Club.
Later, he was in a meeting along with Shippelton and Smythe before being interrupted by Lloyd, Nya, and Zane. Once Underhill realized the ninja were stealing an artifact, Smythe called security which caused the ninja to flee to one of the rooms.
Once the ninja escaped the Explorers Club, the building is left in disarray. When Smythe was talking to Shippelton on who to blame, they were under attack by Venomasicus Tigrus and began to run.
Underhill attended Nya's memorial.
- 111. "The Explorers Club"
- 75. Ocean Race!
- He is only seen once without his hat on, during Nya's memorial.