Father Brown is only too happy to interfere with the work of the police in solving tricky criminal cases, usually with resounding success. That's why the clergyman is transferred to a sleepy island called Abbott's Rock. At first, nothing happens there, but somehow Father Brown seems to be attracted to crime: Soon a gang of thieves is up to no good on the island. So Brown makes the headlines again, and is punitively transferred once more. This time he finds himself in a quiet Irish millionaire community.
Unfortunately the movie Er kanns nicht lassen is not yet available on HBO Max.
| Directing | Axel von Ambesser | Director |
| Editing | Walter Boos | Editor |
| Writing | Egon Eis | Screenplay |
| Production | Utz Utermann | Producer |
| Sound | Martin Böttcher | Original Music Composer |
| Writing | Gilbert Keith Chesterton | Story |
| Writing | Carl Merz | Screenplay |
| Production | Claus Hardt | Executive Producer |
| Camera | Erich Claunigk | Director of Photography |
| Directing | Walter Boos | Assistant Director |
| Costume & Make-Up | Ingeborg Ege-Grützner | Costume Design |
| Sound | Walter Rühland | Sound |
| Art | Klaus Haase | Property Master |
| Camera | Ludwig Maier | Assistant Camera |
| Camera | Karl Bayer | Still Photographer |
| Production | Anderl Kern | Production Manager |
| Art | Horst Giese | Property Master |
| Production | Woldemar Wasa | Production Manager |
| Camera | Hans Osterrieder | Camera Operator |
| Production | Willi Mette | Production Manager |
| Costume & Make-Up | Josef Coesfeld | Makeup Artist |
| Costume & Make-Up | Sophie Obermaier | Makeup Artist |
| Art | Herbert Strabel | Art Direction |
| Production | Rolf Zehetbauer | Production Designer |
