5/1/81: Triangle (TV series)

On 5th January 1981 BBC One began screening the soap opera ‘Triangle’ set on a ferry boat and starring sexy actress Kate O’Mara (d. 2014). The show ran for three series before being cancelled, but is still generally remembered as “some of the most mockable British television ever produced”.
In 1981 Triangle was shown twice weekly during the early eveneing spot on Mondays and Wednesdays.

Sources: Wikipedia, IMDB, BBC Genome.