Complex sentence: In January 2012, Coffey joined the recurring cast of "Pretty Little Liars" as Holden Strauss, an old friend of Aria's, who becomes her way of covering when she's actually going to see Ezra Fitz.
Split into simpler sentences: In January 2012, Coffey joined the recurring cast of "Pretty Little Liars" as Holden Strauss. He is an old friend of Aria's and becomes her way of covering when she's actually going to see Ezra Fitz.