David Janssen is only 43 years old in this video.

alcohol and smoking probably

One actress (I forget who) wrote in her autobiography that Janssen believed he was the illegitimate son of Clark Gable.

Whether he was or not, no one knew for sure.

But Janssen was obsessed by the idea - and that he had suffered because he was not recognized as so.

Apparently became more and more obsessed as he got and drank more heavily.