 | Peter Falk als Columbo |
 | Gene Barry als Dr. Ray Flemming |
 | Katherine Justice als Joan Hudson |
 | William Windom als Burt Gordon |
 | Nina Foch als Carol Flemming |
 | Virginia Gregg als Miss Petrie |
 | Andrea King als Cynthia Gordon |
 | Susanne Benton als The Blonde |
 | Ena Hartman als Nurse |
 | Sherry Boucher als Air Hostess |
 | Anthony James als Tommy |
| Frank Baker als Man in Park (uncredited) |
| Jim Creech als Policeman in Hospital (uncredited) |
| Ed Haskett als Party Guest (uncredited) |
 | Clark Howat als Doctor (uncredited) |
 | Mark Russell als Policeman (uncredited) |
 | Don Stewart als Airline Ticket Man (uncredited) |
| Tom Williams als Laundry Delivery Man (uncredited) |
| James T. Porter | Sound |
| Bud Westmore | Makeup Artist |
| Jerrold Freedman | Associate Producer |
| John McCarthy Jr. | Set Decoration |
| Robert Brower | Color Designer |
| William Link | Teleplay |
| James Redd | Set Decoration |
| Larry Germain | Hairstylist |
| Edward K. Dodds | Unit Manager |
| Richard Irving | Director |
| Ray Rennahan | Director of Photography |
| Russell Kimball | Art Direction |
| Richard Levinson | Teleplay |
| Richard Irving | Producer |
| Dave Grusin | Music |
| Richard Belding | Supervising Editor |
| George Bisk | Assistant Director |
| Burton Miller | Costume Designer |
| Stanley Wilson | Music Supervisor |
| Richard G. Wray | Editor |
