Complex sentence: His son Ben Mankiewicz is a Turner Classic Movies host and a host on "The Young Turks", who also served from September 2008 to September 2009 as co-host (with Ben Lyons) of "At The Movies".
Split into simpler sentences: His son Ben Mankiewicz is a Turner Classic Movies host and a host on "The Young Turks". He also served from September 2008 to September 2009 as co-host (with Ben Lyons) of "At The Movies".