Vic the Viking S01 E36 The Cavern of Frozen Words

Halvar and his men discover a mysterious cavern where Sven and his pirates hide their loot. This cavern has kept all the words Sven and his men exchanged during the last winter. When the pirates arrive to the cavern, the clever Vikings pretend to be invisible and with the words released from their frozen bubbles, the pirates soon get scared. Halvar can have his loot back!