Complex sentence: A brief interlude with captions explaining the campaign, accompanied by music from Radiohead, is followed by the final scene, in which the actress Gillian Anderson is finishing the voice-over for the interlude just seen.
Split into simpler sentences: A brief interlude with captions explains the campaign, accompanied by music from Radiohead. In the final scene, the actress Gillian Anderson is finishing the voice-over for the interlude just seen.