Tintin and the Blue Oranges

Professor Calculus on (B&W) TV broadcasts an appeal to help end world hunger. He receives many letters and parcels and among them a blue orange which can grow in desert conditions (and glows in the dark) from Professor Zalamea, but no letter of explanation. That night, two thieves break into Marlinspike Hall and steal the blue orange. With no other choice, Calculus with Tintin, the Captain and Snowy go to Valencia (filmed in Burjassot, in Simat de la Valldigna at the Monastery of Santa María de la Valldigna, Gandia and Xàtiva).