Two scheming brothers, Dick and Christina, kill their rich uncle, but an inopportune vacuum cleaner salesman shows up to witness the deed. The murderers target Houlighan and the salesman resorts to Murphy to save his life and unmask the crooks.
| Name | Type | Role | |
|---|---|---|---|
| E.F. Wallengren | Writer | ||
| Christine Belford | Guest Star | ||
| David Spielberg | Guest Star | ||
| Linda Darlow | Guest Star | ||
| Patrick Macnee | Guest Star | ||
| Bill Bixby | Director |