As a kid in the 1970’s, I saw this movie which had the main characters involved in some sort of intrigue… but what I remember is that they had these car-cigarette-lighter-sized things that they could jab into a person, twist it, and then the person would combust. Seems the main characters were a middle-aged man, and a younger adult woman (his daughter??). Not sure who they were running from, but I guess it was the “bad guys” – who had been using these things on other people.
Live And Let Die (1973)?
no, it was probably one of those obscure made-for-tv movies, or a b-movie rerun… it was not a 007 movie!!
“The Love War” (1970 TV movie)?
You can watch the entire thing on YouTube, but in 5 different parts each running about 15 min. long. You can see the plug scene and the combustion at 13:52 of the video below.