David Smythe was the manager of a radium company, who hired some thugs to steal the radium and used the talents of some pioneers of the air age called "The Dawn Patrol" to carry the contraband material towards Canada. He controlled the operation as the criminal known as "Shiner", who always wore a shining hood. His organization was ultimately foiled by Batman and Robin.
- This version of David Smythe (Earth-Two), including all history and corresponding appearances, was erased from existence following the collapse of the original Multiverse in the 1985–86 Crisis on Infinite Earths limited series. Even though versions of the character may have since appeared, this information does not apply to those versions.
- 1 Appearances of David Smythe (Earth-Two)
- 1 Images featuring David Smythe (Earth-Two)
- Quotations by or about David Smythe (Earth-Two)
- Character Gallery: David Smythe (Earth-Two)