Spearair was mentioned and although they had two DC-8-32's hence not actually considered in this thread, the story is quite something. Spearair was founded in 1972 to act as charter company for a travel company Keihäsmatkat, founded by Kalevi Keihänen. The name Spearair was lead from the founders name Keihänen, which freely translated stands for Spear. The DC-8's were acquired from National Airlines.
Mr. Keihänen was a rather colourful entrepreneur, constantly seen in local media at the time. His favorite dress speaks quite a bit of the man himself: swimming trousers with a wolf fur coat and a matching hat, no matter whether summer or winter, Finland or Spain. One of his ideas in luring people onboard was offering moonshine with the effect of some travellers having null to zero memories of their first ever holiday in the mediterranean. He also established a bunny farm and served home grown "sexbunny stake" on board. Those journeys weren't exactly family friendly vacations.
Heres a picture of the business master mind with both 8's in the background.
The end of Spearair is a story itself. The last flight was to Istanbul on 3rd May 1974, but as the locals already knew that the company was going under and there were unpaid bills already, the plane OH-SOA was left in a holding pattern without landing clearance until they were running on fumes and had to land.
Once landed the airport refused to provide airstairs until the landing fees were paid. Solution: crew threw sufficient amount of cash in a suitcase out of the door.
So the pax got on their holiday, but Spearair was out of business. Eventually the Finnish goverment sent out Finnair DC-8-62 to collect the stranded travellers but once the flight landed on 9th May the plane was surrounded by armed guards and the plane held as a guarantee for Spearair's debts. It apparently took several hours and a very high level discussions to convince the locals that Finnair had nothing to do with Spearair and was not responsible for the debts and the plane was released.
The DC8's were never paid for so they went back to National airlines.