The Hydronauts: Cast
Eva Michaelis
Neptuna
Robert Missler
Ponto
Tetje Mierendorf
Balty
Carolin Spieß
Octavia
Mario Grete
Obo
Emily Dormer
Neptuna (English version)
Gary Martin
Balty (English version)
Keith Wickham
Ponto (English version)
Dan Russell
Obo (English version)
Emma Tate
Octavia (English version)
Jenni Laakso
Neptuna (Finnish version)
Kimmo Rasila
Ponto (Finnish version)
Rauno Ahonen
Balty (Finnish version)
Jaana Bister
Octavia (Finnish version)
Taisto Oksanen
Obo (Finnish version)
Barbara Beretta
Neptuna (French version)
Vincent Ropion
Ponto (French version)
Pierre Tessier
Balty (French version)
Daniel Beretta
Obo (French version)