Three teenagers and their dog solve mysteries with the help of two ghosts from the 18th century.
| Title | Air Date | Duration | ||
|---|---|---|---|---|
| Season 1 | Episode 1 | Don't Fool with a Phantom | 1971-09-11 | 30 min |
| Season 1 | Episode 2 | Heir Scare | 1971-09-18 | 30 min |
| Season 1 | Episode 3 | I'll Haunt You Later | 1971-09-25 | 30 min |
| Season 1 | Episode 4 | Who's Chicken | 1971-10-02 | 30 min |
| Season 1 | Episode 5 | The Headless Horseman | 1971-10-09 | 30 min |
| Season 1 | Episode 6 | Spirit Spooked | 1971-10-16 | 30 min |
| Season 1 | Episode 7 | Ghost Town Ghost | 1971-10-23 | 30 min |
| Season 1 | Episode 8 | We Saw a Sea Serpent | 1971-10-30 | 30 min |
| Season 1 | Episode 9 | Haunt in Inn | 1971-11-06 | 30 min |
| Season 1 | Episode 10 | Mudsy Joins the Circus | 1971-11-13 | 30 min |
| Season 1 | Episode 11 | Pigskin Predicament | 1971-11-20 | 30 min |
| Season 1 | Episode 12 | The Liberty Bell Caper | 1971-11-27 | 30 min |
| Season 1 | Episode 13 | April's Foolish Day | 1971-12-04 | 30 min |
| Season 1 | Episode 14 | The Forest's Prime-Evil | 1971-12-11 | 30 min |
| Season 1 | Episode 15 | The Hairy Scary Houndman | 1971-12-18 | 30 min |
| Season 1 | Episode 16 | Mudsy and Muddlemore Manor | 1971-12-25 | 30 min |
| Season 1 | Episode 17 | Ghost Grabbers | 1972-01-01 | 30 min |
| Production | Joseph Barbera | Producer |
| Production | William Hanna | Producer |
| Directing | Joseph Barbera | Director |
| Directing | William Hanna | Director |
| Visual Effects | Warwick Gilbert | Animation |
