“Carol and Doug were destined to be together, Margulies said.

Julianna MarguliesandGeorge Clooneywill forever be linked to theirERcharacters, a fact that doesn’t bother them in the slightest.

ButERshocked everyone by reuniting the characters in the season 6 finale, which was also Margulies' last episode.

ER George Clooney as Doctor Doug Ross, Julianna Margulies as Nurse Carol Hathaway

George Clooney and Julianna Margulies on ‘ER’.Paul Drinkwater/NBCU Photo Bank

The reunion had to be kept so secret that executive producerJohn Wellshad to exclude it from the table read.

“‘Look, we have the right ending for Carol.

But we can’t tell anyone.

ER season 1

The cast of ‘ER’.NBCU Photo Bank

Because if it gets out, it won’t be a surprise,'” Margulies recalls him saying.

She joked, “I wish he had warned me before I went into that table read!”

“It was the right ending for them because Carol and Doug were destined to be together.