2. The Griffin Gang

Henry must find a cure when an ancient virus is released.

3. Sleeper in a Box

Investigating a strange "stone," Henry and his friends discover that the object is actually the remains of the Soviet satellite Sputnik - that's wanted by Russian mobsters.

4. Heart of a Warrior

A traveling Samurai exhibit, rumored to be haunted, comes to the museum. When, Henry discovers that some of the exhibit items are being stolen, he is not believed by his uncle. Henry, Maggie and Jasper therefore try to take matters into their own hands, shadowing a martial artist, who they suspect is the thief.

5. Fountain of Truth

Inside a trunk, Henry encounters artifacts, which guide him to a discovery by Ponce de Leon.

6. Public School Enemies

Henry stumbles upon a secret in the Dillinger car.

7. Liberian Candidate

Henry runs into an old friend and rival from the past. Henry believes that this friend's father may be targeted for assassination.

8. Curse of the Rolling Stone

When a ruby, which is supposed to be cursed, ends up stolen, Henry and his friends try to find the ruby and return it to the museum.

9. Now You See Me

After a teenage magician makes a Senator's son vanish, using an old magic trick of Houdini, the disappearance is investigated by Henry.

10. Maximum Insecurity

When a gang of thieves try to steal a WWII computer, Maggie, Jasper and Henry are cornered in the museum, unable to escape.

11. Thor's Slammer

Henry tries to clear his uncle's name by solving the murder of the former partner of Jasper's father and finding a Viking artifact that he was looking for.

12. Speetlemania

The gang discovers an extinct beetle species.

13. Past, Presidents and Future

Henry follows a clue trail left by George Washington as a school election pits Jasper vs. Maggie.