The Onedin Line (TV Series 1971) | Cry of the Blackbird (S01-E012)

Episode 12: James has taken emigrants to Australia where he hopes to make enough money to buy off the Pampero by bringing home a cargo of wool, but the sheep-farmers have all left to join the gold rush. He agrees to ferry a load of 'lost souls' from Papua to Victoria for McPherson, a parson, but discovers the parson is actually a slave trader intent on taking the group to the West Indies. After the Papuans have set fire to the 'parson' James returns them to their homes.

Episode 13: https://rumble.com/v54ayu8-the-onedin-line-tv-series-1971-shadow-of-doubt-s01-e13.html