His first lead role came in the science fiction television show The Zack Files (2000), which its creators described as "an X-Files for kids".

The filming schedule for The Zack Files was tight, but Clark found time to participate in other projects.

In her youth, Boland became well known for her roles in the Canadian children's television shows Noddy and The Zack Files.

He has a younger brother Robert Clark from The Zack Files and Strange Days at Blake Holsey High fame.

He writes four series of children's books, The Zack Files, Secrets of Dripping Fang, Maximum Boy, and Weird Planet.

The Zack Files (chapter book series)

The Zack Files (award-winning 52-episode series based on Greenburg's best-selling book series)

The Zack Files (Decode Entertainment for Fox Family/Channel 4)

The Zack Files, another series about a young protagonist encountering the paranormal, starred Robert Clark and Michael Seater, with Shadia Simmons in a recurring role.

Spencer "Spence" Sharp (played by Michael Seater): Another friend of Zack's and keeper of The Zack Files.