Complex sentence: Collings returned to the role of Poul, now named Paulus, in the episode "Hidden Persuaders" of the audio drama series "Kaldor City"; and on radio he portrayed Legolas in the BBC Radio 4 adaptation of "The Lord of the Rings".
Split into simpler sentences: Collings returned to the role of Poul, now named Paulus, in the episode "Hidden Persuaders" of the audio drama series "Kaldor City";. On radio he portrayed Legolas in the BBC Radio 4 adaptation of "The Lord of the Rings".