The Hardy Boys

Original Series (1928 to 1979)

 1. The Tower Treasure
 2. The House on the Cliff
 3. The Secret of the Old Mill
 4. The Missing Chums
 5. Hunting for Hidden Gold
 6. The Shore Road Mystery
 7. The Secret of the Caves
 8. The Mystery of Cabin Island
 9. The Great Airport Mystery
10. What Happened at Midnight
11. While the Clock Ticked
12. Footprints Under the Window
13. The Mark on the Door
14. The Hidden Harbor Mystery
15. The Sinister Sign
16. A Figure in Hiding
17. The Secret Warning
18. The Twisted Claw
19. The Disappearing Floor
20. Mystery of the Flying Express
21. The Clue of the Broken Blade
22. The Flickering Torch Mystery
23. The Melted Coins
24. The Short-Wave Mystery
25. The Secret Panel
26. The Phantom Freighter
27. The Secret of Skull Mountain
28. The Sign of the Crooked Arrow
29. The Secret of the Lost Tunnel

30. The Wailing Siren Mystery
31. The Secret of Wildcat Swamp
32. The Crisscross Shadow
33. The Yellow Feather Mystery
34. The Hooded Hawk Mystery
35. The Clue in the Embers
36. The Secret of Pirates' Hill
37. The Ghost at Skeleton Rock
38. Mystery at Devil's Paw
39. The Mystery of the Chinese Junk
40. Mystery of the Desert Giant
41. The Clue of the Screeching Owl
42. The Viking Symbol Mystery
43. The Mystery of the Aztec Warrior
44. The Haunted Fort
45. The Mystery of the Spiral Bridge
46. The Secret Agent on Flight 101
47. Mystery of the Whale Tattoo
48. The Arctic Patrol
49. The Bombay Boomerang
50. Danger on Vampire Trail
51. The Masked Monkey
52. The Shattered Helmet
53. The Clue of the Hissing Serpent
54. The Mysterious Caravan
55. The Witchmaster's Key
56. The Jungle Pyramid
57. The Firebird Rocket
58. The Sting of the Scorpion

The Mystery Stories (1979 to 2005)

 59. Night of the Werewolf
 60. Mystery of the Samurai Sword
 61. The Pentagon Spy
 62. The Apeman's Secret
 63. The Mummy Case
 64. Mystery of Smugglers Cove
 65. The Stone Idol
 66. The Vanishing Thieves
 67. The Outlaw's Silver
 68. The Submarine Caper
 69. The Four-Headed Dragon
 70. The Infinity Clue
 71. Track of the Zombie
 72. The Voodoo Plot
 73. The Billion Dollar Ransom
 74. Tic-Tac-Terror
 75. Trapped at Sea
 76. Game Plan for Disaster
 77. The Crimson Flame
 78. Cave-In!
 79. Sky Sabotage
 80. The Roaring River Mystery
 81. The Demon's Den
 82. The Blackwing Puzzle
 83. The Swamp Monster
 84. Revenge of the Desert Phantom
 85. The Skyfire Puzzle
 86. The Mystery of the Silver Star
 87. Program for Destruction
 88. Tricky Business
 89. The Sky Blue Frame
 90. Danger on the Diamond
 91. Shield of Fear
 92. The Shadow Killers
 93. The Serpent's Tooth Mystery
 94. Breakdown in Axeblade
 95. Danger on the Air
 96. Wipeout
 97. Cast of Criminals
 98. Spark of Suspicion
 99. Dungeon of Doom
100. The Secret of the Island Treasure
101. The Money Hunt
102. Terminal Shock
103. The Million-Dollar Nightmare
104. Tricks of the Trade
105. The Smoke Screen Mystery
106. Attack of the Video Villains
107. Panic on Gull Island
108. Fear on Wheels
109. The Prime-Time Crime
110. The Secret of Sigma Seven
111. Three-Ring Terror
112. The Demolition Mission
113. Radical Moves
114. The Case of the Counterfeit Criminals
115. Sabotage at Sports City
116. Rock 'N Roll Renegades
117. The Baseball Card Conspiracy
118. Danger in the Fourth Dimension
119. Trouble at Coyote Canyon
120. The Case of the Cosmic Kidnapping
121. The Mystery in the Old Mine
122. Carnival of Crime
123. The Robot's Revenge
124. Mystery with a Dangerous Beat

125. Mystery on Makatunk Island
126. Racing to Disaster
127. Reel Thrills
128. Day of the Dinosaur
129. The Treasure at Dolphin Bay
130. Sidetracked to Danger
131. Crusade of the Flaming Sword
132. Maximum Challenge
133. Crime in the Kennel
134. Cross-Country Crime
135. The Hypersonic Secret
136. The Cold Cash Caper
137. High-Speed Showdown
138. The Alaskan Adventure
139. The Search for the Snow Leopard
140. Slam Dunk Sabotage
141. The Desert Thieves
142. Lost in Gator Swamp
143. The Giant Rat of Sumatra
144. The Secret of Skeleton Reef
145. Terror at High Tide
146. The Mark of the Blue Tattoo
147. Trial and Terror
148. The Ice-Cold Case
149. The Chase for the Mystery Twister
150. The Crisscross Crime
151. The Rocky Road to Revenge
152. Danger in the Extreme
153. Eye on Crime
154. The Caribbean Cruise Caper
155. The Hunt for the Four Brothers
156. A Will to Survive
157. The Lure of the Italian Treasure
158. The London Deception
159. Daredevils
160. A Game Called Chaos
161. Training for Trouble
162. The End of the Trail
163. The Spy that Never Lies
164. Skin and Bones
165. Crime in the Cards
166. Past and Present Danger
167. Trouble Times Two
168. The Castle Conundrum
169. Ghost of a Chance
170. Kickoff to Danger
171. The Test Case
172. Trouble in Warp Space
173. Speed Times Five
174. Hide and Sneak
175. Trick-of-Trouble
176. In Plane Sight
177. The Case of the Psychic's Vision
178. The Mystery of the Black Rhino
179. Passport to Danger
180. Typhoon Island
181. Double Jeopardy
182. The Secret of the Soldier's Gold
183. Warehouse Rumble
184. The Dangerous Transmission
185. Wreck and Roll
186. Hidden Mountain
187. No Way Out
188. Farming Fear
189. One False Step
190. Motocross Madness

Undercover Brothers (2005-)

1. Extreme Danger
2. Running on Fumes
3. Boardwalk Bust
4. Thrill Ride
5. Rocky Road
6. Burned
7. Operation: Survival
8. Top Ten Ways to Die
9. Martial Law
10. Blown Away
11. Hurricane Joe
12. Trouble in Paradise
13. The Mummy's Curse
14. Hazed
15. Death and Diamonds

16. Bayport Buccaneers
17. Murder at the Mall
18. Pushed
19. Foul Play
20. Feeding Frenzy
21. Comic Con Artist
22. Deprivation House (Murder House 1)
23. House Arrest (Murder House 2)
24. Murder House (Murder House 3)
25. Haunted
26. Double Trouble (Double Trouble 1)
27. Double Down (Double Trouble 2)
28. Double Deception (Double Trouble 3)
29. Galaxy X (Galaxy X 1)

The Casefiles (1987 to 1998)

 1. Dead on Target
 2. Evil, Inc.
 3. Cult of Crime
 4. The Lazarus Plot
 5. Edge of Destruction
 6. The Crowning Terror
 7. Deathgame
 8. See No Evil
 9. The Genius Thieves
10. Hostages of Hate
11. Brother Against Brother
12. Perfect Getaway
13. The Borgia Dagger
14. Too Many Traitors
15. Blood Relations
16. Line of Fire
17. The Number File
18. A Killing in the Market
19. Nightmare in Angel City
20. Witness to Murder
21. Street Spies
22. Double Exposure
23. Disaster for Hire
24. Scene of the Crime
25. The Borderline Case
26. Trouble in the Pipeline
27. Nowhere to Run
28. Countdown to Terror
29. Thick as Thieves
30. The Deadliest Dare
31. Without a Trace
32. Blood Money
33. Collision Course
34. Final Cut
35. The Dead Season
36. Running on Empty
37. Danger Zone
38. Diplomatic Deceit
39. Flesh and Blood
40. Fright Wave
41. Highway Robbery
42. The Last Laugh
43. Strategic Moves
44. Castle Fear
45. In Self-Defense
46. Foul Play
47. Flight into Danger
48. Rock 'n Revenge
49. Dirty Deeds
50. Power Play
51. Choke Hold
52. Uncivil War
53. Web of Horror
54. Deep Trouble
55. Beyond the Law
56. Height of Danger
57. Terror on Track
58. Spiked!
59. Open Season
60. Deadfall
61. Grave Danger
62. Final Gambit
63. Cold Sweat
64. Endangered Species

 65. No Mercy
 66. The Phoenix Equation
 67. Lethal Cargo
 68. Rough Riding
 69. Mayhem in Motion
 70. Rigged for Revenge
 71. Real Horror
 72. Screamers
 73. Bad Rap
 74. Road Pirates
 75. No Way Out
 76. Tagged for Terror
 77. Survival Run
 78. The Pacific Conspiracy
 79. Danger Unlimited
 80. Dead of Night
 81. Sheer Terror
 82. Poisoned Paradise
 83. Toxic Revenge
 84. False Alarm
 85. Winner Take All
 86. Virtual Villainy
 87. Dead Man in Deadwood
 88. Inferno of Fear
 89. Darkness Falls
 90. Deadly Engagement
 91. Hot Wheels
 92. Sabotage at Sea
 93. Mission: Mayhem
 94. A Taste for Terror
 95. Illegal Procedure
 96. Against All Odds
 97. Pure Evil
 98. Murder by Magic
 99. Frame-Up
100. True Thriller
101. Peak of Danger
102. Wrong Side of the Law
103. Campaign of Crime
104. Wild Wheels
105. Law of the Jungle
106. Shock Jock
107. Fast Break
108. Blown Away
109. Moment of Truth
110. Bad Chemistry
111. Competitive Edge
112. Cliff-Hanger
113. Sky High
114. Clean Sweep
115. Cave Trap
116. Acting Up
117. Blood Sport
118. The Last Leap
119. The Emperor's Shield
120. Survival of the Fittest
121. Absolute Zero
122. River Rats
123. High Wire Act
124. The Viking's Revenge
125. Stress Point
126. Fire in the Sky
127. Dead in the Water

The Clues Brothers (1997 to 2000)

1. The Gross Ghost Mystery
2. The Karate Clue
3. First Day, Worst Day
4. Jump Shot Detectives
5. The Dinosaur Disaster
6. Who Took the Book?
7. The Abracadabra Case
8. The Dog-Gone Detectives
9. The Pumped-Up Pizza Problem

10. The Walking Snowman
11. The Monster in the Lake
12. King for a Day
13. Pirates Ahoy!
14. All Eyes on First Prize
15. Slip, Slide, and Slap Shot
16. The Fish-Faced Mask of Mystery
17. The Bike Race Ruckus