On Demand TV "Not So Everywhere"

Comcast Cable subscribers will be able to watch popular cable television series such as HBO's "Entourage" and AMC's "Mad Men" on your computer by the end of the year without paying extra — as long as you're a Comcast Corp. subscriber watching at home.

The initiative is a starting point for Comcast, which hopes to eventually offer what some call "TV Everywhere" service: linear video programming on demand, over any broadband network.

Comcast, wanting to make sure the shows will remain off-limits to non-subscribers, apparently still is working on providing access over competing home broadband systems as well as on the go — at work, on laptops and, one day, over cell phones.

Comcast will be the first cable TV operator to unlock online access to a many cable shows and movies, aiming to replicate what's available on television through video on demand.

Comcast subscribers can initially watch shows and movies only on their home computers after being verified by the cable system. And for now, the online viewing will be restricted to those who also get Internet service through Comcast, and not on any broadband connection.

That might be helpful for Comcast consumers watching on-demand fare at home. It will not be so helpful if those customers would prefer to watch on their mobiles or any other broadband connection.

But it is a start.