| #21: The Case of the Missing Train Car | April 9, 1988 | |
| #39: The Case of the Secret Room (Part 1) | August 13, 1988 | |
| #40: The Case of the Secret Room (Part 2) | August 20, 1988 | |
| #82: Heatwave | August 12, 1989 | |
| #102: The Treasure of LeMonde! | February 3, 1990 | |
| #113: Suspicious Minds | May 5, 1990 | |
| #118: What Happened To The Silver Streak? | July 7, 1990 | |
| #142: Train Ride | January 26, 1991 | |
| #196: Harlow Doyle, Private Eye | June 27, 1992 | |
| #207: The Case of the Candid Camera | October 10, 1992 | |
| #244: The Mysterious Stranger (Part 1) | September 18, 1993 | |
| #245: The Mysterious Stranger (Part 2) | September 25, 1993 | |
| #249: The Case of the Delinquent Disciples | November 6, 1993 | |
| #309: The Perfect Witness (Part 1) | April 8, 1995 | |
| #310: The Perfect Witness (Part 2) | April 15, 1995 | |
| #311: The Perfect Witness (Part 3) | April 22, 1995 | |
| #511: The Pact (Part 1) | March 8, 2003 | |
| #512: The Pact (Part 2) | March 15, 2003 | |
| #518: The Case of the Disappearing Hortons | May 24, 2003 | |
| #520: The Mystery at Tin Flat | June 7, 2003 | |
| #546: No Way Out | May 22, 2004 | |
| #547: No Way In | May 29, 2004 | |
| #548: Sounds Like a Mystery | October 2, 2004 | |
| #658: Game For A Mystery | March 27, 2010 | |
| #667: The Mystery Of The Clocktower (Part 1) | October 2, 2010 | |
| #668: The Mystery Of The Clocktower (Part 2) | October 9, 2010 | |
| #679: The Green Ring Conspiracy (Part 1) | March 12, 2011 | |
| #680: The Green Ring Conspiracy (Part 2) | March 19, 2011 | |
| #681: The Green Ring Conspiracy (Part 3) | March 26, 2011 | |
| #682: The Green Ring Conspiracy (Part 4) | April 2, 2011 | |
| #683: The Green Ring Conspiracy (Part 5) | April 9, 2011 | |
| #684: The Green Ring Conspiracy (Part 6) | April 16, 2011 | |
| #685: The Green Ring Conspiracy (Part 7) | April 23, 2011 | |
| #686: The Green Ring Conspiracy (Part 8) | April 30, 2011 | |
| #687: The Green Ring Conspiracy (Part 9) | May 7, 2011 | |
| #688: The Green Ring Conspiracy (Part 10) | May 14, 2011 | |
| #689: The Green Ring Conspiracy (Part 11) | May 21, 2011 | |
| #690: The Green Ring Conspiracy (Part 12) | May 28, 2011 | |
| #733: Big Trouble Under the Big Top | September 21, 2013 | |
| #748: The Perfect Gift | October 1, 2014 | |
| #786: The Case of the Ball Cap Hero | March 26, 2016 | |
| #804: The Key Suspect | November 19, 2016 | |
| #809: Fathers and Sons | April 15, 2017 | |
| #826: Find a Penny (Part 1) | October 7, 2017 | |
| #827: Find a Penny (Part 2) | October 14, 2017 | |
| #833: The Secret of the Writer's Ruse | April 14, 2018 | |
| #878: Nightmares by Constance (Part 1) | November 2, 2019 | |
| #879: Nightmares by Constance (Part 2) | November 9, 2019 | |
