English version of "Powrót z wyspy", adapted by
Anne Wood of the production company FilmFair, consists of two separate ~5 minute episodes titled "Island Treasures" (as episode 17) and "Return to Moominvalley" (as episode 18). They were originally broadcast in the UK in 1983 on Central Independent Television, as part of its "Watch It!" strand of children's programming. The main differences of the UK episode "Island Treasures" include:
- The first half of the UK episode is taken from the original episode "Burza na wyspie" (#14). The Moomin family wakes up after a stormy night and watch how the Hattifatteners sail away. After a shot of a butterfly flying over Snork Maiden and her flowers on the beach, the UK episode cuts to another original episode, "Powrót z wyspy" (#15). Missing from the UK episode is the ending sequence of the original episode "Burza na wyspie", where the children are playing and swimming in the water. Snufkin is also playing a flute.
- The second half of the UK episode is taken from the original episode "Powrót z wyspy" (#15), starting from the shot where Moomintroll dives into the water from the rocks on the shore. The original opening shots of the island and the boat, and the shot of Moominpappa writing his memoirs on the cliffs are moved to the beginning of the UK episode "Return to Moominvalley". Missing from the UK episode is another shot of Moominpappa writing his memoirs, some additional shots of Moomintroll and Snork Maiden swimming, and an additional shot of Sniff stumbling into the gold.
- Also moved to the beginning of the UK episode "Return to Moominvalley" is the longer sequence where Moomintroll finds a ball on a rope from the water and a snow globe from the sand. Sniff finds a lifebelt made of cork, a wooden bucket and an old shoe, and then both are playing with the treasures they found. The UK episode "Island Treasures" ends with the sequence of Snufkin wandering on the beach and playing his flute (last shot is a close-up of a butterfly).
- Some shots here and there are missing or rearranged in the UK episode "Return to Moominvalley". The original ending sequence where the Moomin family sails home, dock their boat and walk through the forest (with owls) in the evening back to the Moominhouse is shorter in the UK version.