Season 4

1. Heads, I Win, Tails, You Lose

May 5, 2025 · 46m

Harry and Fergus take on a disturbing case-a serial killer targeting random victims and leaving a coin in their mouths. Meanwhile, Harry B. asks a reluctant Harry to travel the world with him. Fergus plans to attend college with Lola.

2. For Whom the Bell Tolls

May 5, 2025 · 50m

Harry and Fergus travel to the convent of a silent order of nuns after an old friend asks Harry to investigate a suspicious suicide, believing foul play is afoot. Elsewhere, a familiar face provides a very welcome surprise.

3. Hold Your Horses, We've a Killer to Catch

May 12, 2025 · 48m

A fun day at the races for Harry and Fergus ends in tragedy when a racehorse throws its jockey from the saddle. Harry B discovers the horse was sabotaged and insists the owner, his father, Duncan, is responsible for the crime.

4. Murder on the Dance Floor

May 19, 2025 · 42m

After two performers go missing from Genevieve Le Coeur's dance school, Orla and Lola persuade Harry to investigate. In search of the truth behind the disappearances, Harry and Fergus dive into the history of the school and its founder.

5. The Death of Harry Wild

May 26, 2025 · 41m

While attending a crime convention, Harry's look-alike is pushed to her death from a balcony. To stop the killer fleeing Harry and Fergus get security to lock the building down while they investigate. A second murder reveals a chilling connection.

6. The Final Chapter

June 2, 2025 · 46m

When a heckler dies during a guided tour, the investigation brings Harry and Fergus into the middle of a literature-themed murder plot; in America, FBI agents fail to prevent an assassination by Diyu.

7. You Are Cordially Invited to an Assassination - Part 1

November 24, 2025 · 41m

At Vicky and Cormac's wedding, Harry and Fergus interrupt an assassin's kill.

8. You Are Cordially Invited to an Assassination - Part 2

November 24, 2025 · 43m

Harry and Fergus call on all the help they can to stop an heinous assassin.