Complex sentence: Most recently, he has been on the show since 1999, only to have his character killed off in the spring of 2004 by Dr. Marlena Evans (This was done to reduce the show's budget).
Split into simpler sentences: Most recently, he has been on the show since 1999. His character was killed off in the spring of 2004 by Dr. Marlena Evans (This was done to reduce the show's budget).