In Canada, the TV show "ER" can currently be watched by purchasing episodes or seasons on platforms like Apple TV and Prime Video. It is not available on major streaming services directly in Canada such as Netflix or HBO Max, which often do not have the rights for Canadian viewers. Hulu and Max have the show in the US, but Hulu is not available outside the US including Canada. To watch "ER" in Canada, the most reliable legal options are:

• Purchase or rent episodes on Apple TV
• Purchase or rent episodes on Prime Video

There are no current free streaming options for "ER" in Canada.