Tintin and Captain Haddock learn there are violent rivals who are after the treasure of the Unicorn themselves.
Elenco:
Thierry Wermuth
,
Christian Pelissier
,
Henri Labussière
,
Yves Barsacq
,
Jean-Pierre Moulin
,
Susan Roman
,
Michel Ruhl
,
Marie Vincent
,
Georges Berthomieu
,
Marc Moro
,
Sophie Arthuys
.