dagger | Gold Dagger | Dagger of the Mind | Quill and Dagger | Dagger | CWA New Blood Dagger | Cloak of Levitation | Chelsea Dagger | Napier Dagger | Katara (dagger) | Ink & Dagger | Dagger head box | Cartier Diamond Dagger |
Both the Martin Li and Mr. Negative personas are the result of experimental drug tests done by Maggia chemist Simon Marshall, the same tests that powered Cloak and Dagger (namely Cloak's association with the Darkforce).
Like many "cloak-and-dagger" novelists, Hagberg has a professional background in espionage, having spent his stint of military duty as a cryptographer for U.S. Air Force Intelligence.
Roger Wolcott Hall (May 20, 1919, Baltimore, Maryland - 20 July 2008, Windsor Hills, DE; congestive heart failure) was an American Army officer and spy in the Office of Strategic Services during World War II and the author of a humorous memoir of his experiences in the Office of Strategic Services (OSS), entitled You’re Stepping on My Cloak and Dagger (1957).