Complex sentence: After a brief hiatus, Karthik made a comeback with this film, collaborating with Mani Ratnam for the third time after "Mouna Ragam" and "Agni Natchathiram".
Split into simpler sentences: After a brief hiatus, Karthik made a comeback with this film. It was his third collaboration with Mani Ratnam after "Mouna Ragam" and "Agni Natchathiram".