Complex sentence: Meanwhile, Nicky realises the extent of Donohue's corrupt dealings with the building contractor, John Edwards (Geoffrey Hutchings), and resigns in disgust, eventually becoming involved with left-wing anarchists in London.
Split into simpler sentences: Meanwhile, Nicky realises the extent of Donohue's corrupt dealings with the building contractor John Edwards (Geoffrey Hutchings). He resigns in disgust, eventually becoming involved with left-wing anarchists in London.