That was fast.

After just one episode, Showtime has green lighted a second season order of Nurse Jackie, following last night's series premiere of the Edie Falco drama. It became Showtime's most-watched series premiere in history.

Nurse Jackie was seen by one million viewers; it then earned another 350,000 during its same-night repeat for a total of 1.35 million viewers.

Weeds, which also premiered last night, saw approximately 1.7 million viewers for its debut, and rerun, episodes combined.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.