[ConservativeMind]

The current shows are still free, but they are now charging for unlimited access to the whole catalog of past years:

http://help.pbs.org/support/solutions/articles/5000692514-if-i-do-not-have-pbs-passport-will-i-still-be-able-to-watch-programs-on-pbs-org-and-my-station-s-sit

[Spunky]

I didn't get in on the beginning of "Mercy Street" so I was hoping I could go online and start at the beginning. It wouldn't let me unless I paid for it.

It appeared it only let you watch that weeks program before the next weeks came on.

I will try it again.