The author Peter Ustinov has called his work "Endspurt" a "biographical adventure". Biographical because the somewhat ambitious but later successful writer Sam Kinsale meets here as a twenty-, forty- and sixty-year-old. The interesting thing about this film, however, is that the four Sams are confronted with each other. The diversity of an eighty-year-old life becomes transparent. At the age of 20, Sam Kinsale loves the young Stella and is determined to marry her. But 20 years later, he is fed up with the marriage and wants to leave her. But he doesn't because she is expecting a child. As a sixty-year-old, he is constantly making compromises both in his work as a writer and in his personal life.
| Actor | Role |
|---|---|
 Heinz RühmannSam Kinsale mit 80 Jahren | Sam Kinsale mit 80 Jahren |
| OOtto GrafSam Kinsale mit 60 Jahren | Sam Kinsale mit 60 Jahren |
| RRolf HennigerSam Kinsale mit 40 Jahren | Sam Kinsale mit 40 Jahren |
| JJoachim AnsorgeSam Kinsale mit 20 Jahren | Sam Kinsale mit 20 Jahren |
| EEmmy BurgStella Kinsale | Stella Kinsale |
| EEva Katharina SchultzStella Kinsale mit 40 Jahren | Stella Kinsale mit 40 Jahren |
| VVeronika BayerStella Kinsale mit 20 Jahren | Stella Kinsale mit 20 Jahren |
 Fritz TillmannReginald Kinsale | Reginald Kinsale |
 Ingrid van BergenClarice und Ada | Clarice und Ada |
| DDieter RanspachJimmy Kinsale | Jimmy Kinsale |