Noah Wyle — ER
This project was one of the longest-running TV series about medicine in the history of the US. It started in 1994 and ended in 2009. Maybe, it was so successful because of the script — all the medical cases shown were based on true events.
The star of ER, Noah Wyle, who portrayed Dr. Carter, is 49 years old now and he continues to make his fans happy with his new roles in other TV series.