Leonard Maltin narrates this documentary on how Jackson Gillis adapted the "The Tower Treasure" to The Mystery of the Applegate Treasure. Features Disney TV historian Bill Cotter as the resident expert, but surprisingly has no footage or even photos of Gillis.
Leonard Maltin interviews Tim Considine and Tommy Kirk about their experience filming the Hardy Boys. Tommy gives Leonard a worse time than Harry Carry Jr did on the Spin and Marty DVD; by the end, Leonard is plainly grimacing and longing for the fadeout.
The Fun With Music Day that introduced the Hardy Boys is shown in its entirety. A newsreel precedes Darlene and Bobby in "Amusement Park". The Hardy Boys introduction follows, then a Doddism, followed by the Mousekartoon, "Mickey's Rival".
Leonard Martin provides an introduction to the continuing series and an overview of bonus features.