Characters in Flesh and Blood

Frank Hardy

Also in Crawling with Zombies, Deadly Strategy, Dead on Target, Time Bomb, At All Costs, Break-Up!, See No Evil, Hostages of Hate, Brother Against Brother, Perfect Getaway

Joe Hardy

Also in Crawling with Zombies, Deadly Strategy, Dead on Target, Time Bomb, At All Costs, Break-Up!, Brother Against Brother, Perfect Getaway, Deception on the Set, Blood Relations

Chet Morton

Also in The Disappearing Floor, The Mystery of the Flying Express, The Clue of the Broken Blade, The Melted Coins, Countdown to Terror, The Sign of the Crooked Arrow, The Secret of the Lost Tunnel, The Wailing Siren Mystery, Secret of Pirates' Hill, Mystery of the Desert Giant

Fenton Hardy

Also in Edge of Destruction, Brother Against Brother, Blood Relations, The Number File, The Twisted Claw, The Clue of the Broken Blade, The Flickering Torch Mystery, The Secret Panel, The Secret of Skull Mountain, Blood Money

Leonard Mock