While investigating the death of an investment counselor, Diamond learns that a letter has recently been stolen from the deceased's attorney.
| Name | Type | Role | |
|---|---|---|---|
| Ellis Kadison | Writer | ||
| Bartlett Robinson | Guest Star | ||
| Francis DeSales | Guest Star | ||
| Norma Moore | Guest Star | ||
| Walter Barnes | Guest Star | ||
| Garry Walberg | Guest Star | ||
| Charles Victor | Guest Star | ||
| Charles Cirillo | Guest Star | ||
| Burt Nelson | Guest Star | ||
| Jocelyn Brando | Guest Star | ||
| Ted Post | Director |