Dodsworth Nash is told that Jennifer Hart was born in 1949, but in Hartland Express (1981) Jennifer's driver's license gives her DOB as 11/2/1946, while Stefanie's birthdate is 11/2/42.
As Jennifer, Stefanie Powers keeps her fingernails rather short. The hand that removes the token and diamond ring from the box, the fingernails are seen as much longer.
Jonathan says they've got to search the kidnaper's home, and Max tells him he'll never get a search warrant. They are private citizens, they don't *need* [& could never, ever get] a search warrant. That requirement applies only to government authorities [& those acting on the government's behalf]
Max brings Jonathan a tray of medicines for his injured arm which is in a sling. There are pills and a liquid medicine, both still in their containers, and both of which require two hands to open.