A number of familiar faces
I watch a number of CBS shows and this show--especially episode 2.1, Balm in Gilead--features some very familir names and faces. Obviously Josh Radnor is known from CBS' show HIMYM, and also Mary Elizabeth Winsted from the late, lamented BrainDead. But in this episode we also see Patina Miller from Madam Secretary, and Nyambi Nyambi of Mike & Molly. Other faces are also familiar, such as the bishop from a few episodes of Blue Bloods, and Gary Cole, from various shows (including The Good Wife).
Incidentally, a number of Mercy Street actors have been seen in one or more episodes of Elementary, yet another CBS show.
Just a random observation......