Complex sentence: Patrick Kelly called Fuller to his office in 1959 to offer the young actor an opportunity for a co-starring role opposite Academy Award-winner Ray Milland, in the 1950s detective series, "Markham".
Split into simpler sentences: Patrick Kelly called Fuller to his office in 1959. Kelly offered him an opportunity for a co-starring role opposite Academy Award-winner Ray Milland, in the 1950s detective series, "Markham".