Complex sentence: He penned an adaptation of "Tess of the D'Urbervilles" for the BBC, which aired in 2008, and is now working on an adaptation of "Far From the Madding Crowd" for BBC Films.
Split into simpler sentences: He penned an adaptation of "Tess of the D'Urbervilles" for the BBC which aired in 2008. He is now working on an adaptation of "Far From the Madding Crowd" for BBC Films.