Grover travels to Switzerland to investigate the black-mailing of people who have secret numbered accounts in a Swiss Bank.
| Name | Type | Role | |
|---|---|---|---|
| S.S. Schweitzer | Writer | ||
| Joanna Miles | Guest Star | ||
| Bert Convy | Guest Star | ||
| Gloria Manon | Guest Star | ||
| Lauri Peters | Guest Star | ||
| Walter Alzmann | Guest Star | ||
| Whit Bissell | Guest Star | ||
| Ramon Bieri | Guest Star | ||
| Steve Merrick | Guest Star | ||
| Paulette Breen | Guest Star | ||
| Luther Adler | Guest Star | ||
| Peter Mark Richman | Guest Star | ||
| Allan Reisner | Director | ||
| Lou Shaw | Director | ||
| S.S. Schweitzer | Director |