Full episodes can be found here: https://thefirsts.buzzsprout.com 

The Firsts: The Forerunners of Islam is the series that visits trailblazers of the ummah. Those that rise to the occasion, and inspire a generation. Host Sh. Dr. Omar Suleiman dives into the stories of the giants who were the first of their kind in this world, and distinguished in the next. Listen in to revive the personalities buried in history. 
Let’s meet the Firsts. 
This series is brought to you by Yaqeen Institute for Islamic Research.