“Survivor: Samoa” debuts Thursday, Sept. 17, and the two-hour (two hour!!!) season premiere of “The Amazing Race” is 7-9 p.m. Sunday, Sept. 27.

What else do you need to know?

“Three Rivers” doesn’t arrive until Oct. 4, but most of CBS’ new and returning shows will turn up beginning Sept. 21, with “How I Met Your Mother.”