The Octonauts & the Great Summer Adventure

Simon Greenall

Barnacles (voice)

Rob Rackstraw

Kwazii (voice)

Paul Panting

Peso (voice)

Keith Wickham

Prof. Inkling / Dr. Shellington (voice)

Jo Wyatt

Tweak (voice)

Teresa Gallagher

Dashi (voice)

Michael C. Murphy

Tunip (voice)

Ross Breen

Barnacles (singing voice)