The title is taken from a Liverpool saying, "Off on a vinegar trip," which is applied to a person behaving strangely. Barrie plays Sammy Chester, a pensioner who shocks his daughters and whose cavorting leads to a heart attack. His eldest daughter takes him to live with her, and calls a family conference to decide what is to be done Sammy is far from happy with the arrangements.
| Actor | Role |
|---|---|
 John BarrieSammie | Sammie |
| SStella MorayJenny | Jenny |
 Norman RossingtonBill | Bill |
 Barbara YoungNora | Nora |
 Tony HaygarthBob | Bob |
 Madge HindleBrenda | Brenda |
 John ComerLeslie | Leslie |
| JJudith BarkerDot | Dot |