Thalassa (TV series)  Thalassa is a French documentary television series, broadcast for many years on Friday at 8:50 pm on France 3 and presented by Georges Pernoud. In 2017, Pernoud announced his departure from "Thalassa". From 2 October 2017, Fanny Agostini presented the show, once a month on a Monday at 8:55 pm, alternating with other discovery programs, including "Faut pas rêver", another show created by Pernoud. "Thalassa" is produced by France Télévisions. The show is also broadcast on TV5 Monde and is subtitled in six languages, including English. It is entirely focused on the sea (θάλασσα, "thálassa" in Ancient and Modern Greek) – geography, ecology, fishing, transportation, and yachting. It is one of the oldest French TV series still running (together with "Des chiffres et des lettres"). It started on 27 September 1975 and is still one of the most prominent TV programs in France.