Doctor Knock takes over a medical clinic in a small town and provides a medical revival.
| Actor | Role |
|---|---|
 Ernst-Hugo JäregårdDr. Knock | Dr. Knock |
 Isa QuenselMrs. Parpalaid | Mrs. Parpalaid |
 Erik HellParpalaid | Parpalaid |
 John ElfströmProfossen | Profossen |
 Heinz HopfBernard | Bernard |
 Per OscarssonMousquet | Mousquet |
 Gun RobertsonLady in black | Lady in black |
 Hjördis PettersonLady in purple | Lady in purple |
 Silvija BardhMariette | Mariette |
 Carl-Gunnar WingårdNot listed | Not listed |
 Bert-Åke VargNot listed | Not listed |
 Marianne StjernqvistNot listed | Not listed |
 Lars PassgårdNot listed | Not listed |
 Ulla-Britt Norrman-OlssonNot listed | Not listed |
| LLennart PilottiNot listed | Not listed |