Watch trailers for NBC's new fall series

NBC is adding three new series to its fall schedule in what executives describe as a sign of stability. Nine more are due in midseason, and many will have fewer episodes than in past years.

Here's a peek at the newcomers:

Timeless , a time-travel thriller that will follow The Voice on Mondays; This Is Us, an emotional drama about unexpected connections among varied characters; The Good Place, a comedy starring Kristen Bell and Ted Danson.