This back-story is explained in narration at the start of the first episode, accompanied by 'flashback' footage that is actually mostly taken from episode six.
Their business operates from an Airport cafÃ© manned by Tino Riva Klaus Dahlen , who also serves as pilot, and his Italian mother Winni Riva , who usually stays in the kitchen.
Of course a big reason for it's popularity then and now is former Sexploitation star Ingrid Steeger.
It also doesn't help that Steeger sports a very weird perm could be a wig for the entire series.
They're crew consists of a pilot, Tino Riva, who has a day job as a cook at the local airport cafÃ©.