Last summer, ABC aired two Boston-based medical docu-series — Save My Life: Boston Trauma and Boston EMS. Only the latter TV show was renewed and brought back this summer. Will Boston EMS do well enough in the ratings to be renewed for a third season? Will it be cancelled? Stay tuned.

On Boston EMS, viewers “ride along” with the proud men and women of the Boston Emergency Services — some of the same first responders who answered the desperate calls when the bombs went off at the Boston Marathon in 2013.

The ratings are typically the best indication of a show’s likelihood of staying on the air. The higher the ratings (particularly the 18-49 demo), the better the chances for survival. This chart will be updated as new ratings data becomes available — typically around 11:30am EST/8:30am PST. Refresh to see the latest.

8/28 update: You can see the latest night’s ratings in context.

Note: If you’re not seeing the updated charts, please try reloading the page. You can also see them here.

For comparisons: The first season of Boston EMS on ABC averaged a 0.52 rating in the 18-49 demographic with 2.50 million viewers.

Note: These are the final national numbers (unless noted with an “*”). These are different from the fast affiliate numbers which are just estimates of the actual ratings. The final nationals are typically released within 24 hours of the programming or, in the case of weekends and holidays, a couple days later.

What do you think? Do you like the Boston EMS TV series? Do you think it should be cancelled or renewed for a third season?