The combined figure tops the competition on broadcast TV except "Sunday Night Football" on NBC and "60 Minutes" on CBS, according to preliminary numbers.
The miniseries about the infamous outlaw couple aired on A&E, History and Lifetime on Sunday night. The second part of the miniseries will run tonight.
"Bonnie & Clyde" brought 3.7 million viewers for History, 3.1 million for Lifetime and 3 million people for A&E.
Even with the ratings of all three networks combined, however, "Bonnie & Clyde" so far hasn't matched two other recent miniseries hits that ran on History alone: "Hatfields & McCoys" and "The Bible." The first night of "Hatfields & McCoys" got 13.9 million viewers in 2012, while the first part of "The Bible" got 13.1 million viewers in March.
History is now working on a sequel to "The Bible."