Abercromby's crew •
Abercromby – the show's titular character, Abercromby is a boy who dreams of an adventure where he is trying to find his Grandpa's missing watch. •
Siren – Abercromby's shipmate, and the living
figurehead of the ship. She believes in Abercromby the most, and is the one who will convince the others to save him. •
Great Oak – a
talking tree, an Oak Tree in particular, he is the ship's helmsman, and responsible for keeping the ship moving. He is also the fount of knowledge and wisdom on board the ship. •
Arthur – a talking
suit of armour that works on the ship. Arthur is a bumbling character, and is the prominent character in the series, next to Abercromby himself. •
Poindexter – the ship's janitor, who is also a purple talking dog. Poindexter is quite intelligent, as he is shown doing things humans are subject to do. Aside from Captain Abercromby, he is the only character to cross from the "real" world into the "dream" world.
Thunderbottom Crew •
Captain Jake – a pirate, and arch rival to Abercromby. Although Jake is a fully grown man, he often resorts to very childish behaviour. Jake looks like a very typical
pirate, but much of his appearance is put on – his eyepatch just covers a perfectly good eye, and his hook is held in one of his hands. Jake's schemes to catch up with Abercromby usually involve a comedic comeupance. •
Bobweb – a
spider, she sits on Jake's shoulder much as a parrot would on a
stereotypical pirate. She is the scheming half of the partnership, more intelligent than Jake, but just as likely to get her just deserts. •
Russian Dolls – the Thunderbottom is also home to three black and white "pirate-themed"
Russian dolls, varying in size from one bigger than all the other characters on board to a small "Baby skull" doll. •
Seagulls – most of the crew of Thunderbottom is
Seagulls who often speak or are randomly assigned a name. •
Clawdia – ship's cat, and most often behind the wheel of the Thunderbottom. •
Snappy – the chef. A red
lobster, he was voiced in a pastiche of Woody Allen's mannerisms.
Other characters •
Sultan – the ruler of "Rabadabdab", a seaside exotic port which was the most frequent mooring for the "Hope". Like most of "Rabadabdab"'s inhabitants, he was a bird, a purple
puffin. •
Lily Limpet – East-end
mollusc who serves food and drink at the Limpet Inn, Rabadabdab's drinking hole (soft drinks only!) •
Admiral Dobbin – authority figure, head of the "King's Navy". Admiral Dobbin would often enter the story to sort out a mess. •
Grandpa – Abercromby's grandfather and guardian whose watch Abercromby dreams of finding. ==Episode titles==