Oh boy! It was the second Monday of the summer TV season last night and for the second straight time, a rerun of CBS’ The Big Bang Theory (2.7 rating/7 share in adults 18-49) was the top program of the night in the 18-49 demo. But this time, all other networks aired all-original programming that included several premieres.

ABC did the best with The Bachelorette (2.6/8), up 4% from last week, and True Beauty (1.9/5), down 5%.

NBC’s revival of former summer staple Last Comic Standing (2.0/6) came back down 17% from its last season premiere two years ago. It was followed by the premiere of the acquired Christopher McQuarrie series Persons Unknown, which barely registered with a 1.3/4.

News wasn’t much better for another direct-to-series project from Fox TV Studios, Fox’s The Good Guys, which drew a 1.4/4 in 18-49 and 4.6 million viewers overall in its debut, following the preview before American Idol last month, which averaged a 1.5/5 in the demo.  Fox took a leap of faith with the cop dramedy from Burn Notice creator Matt Nix, giving it an order for additional episodes and putting it on the fall schedule (albeit in a lower-profile Friday slot) before the show had premiered. The network also put strong promotional muscle behind its launch. But the debut of The Good Guys actually ranked lower than last week’s season premiere of Burn Notice on USA, which drew 6.6 million viewers. The Good Guys’  lead-in, the summer premiere of Lie To Me (1.8/6), did a little better but still finished third in the 8 PM hour.  Overall, ABC (2.3/7 in 18-49, 6.9 million viewers) won the night in the demo and finished second in total viewers, while CBS’ all-repeat Monday lineup (2.0/6, 7.6 million) was tops in viewers and No.2 in 18-49. NBC (1.8/5, 4.8 million) and Fox (1.6/5, 5.3 million) followed.