This is Part 45 of the Christian History Series. This episode is part 2 focusing on the Evangelicals that rose up to oppose the Liberal Theologians of the 19-20th Centuries.

Here are the sources I used:
"A Concise History of Christian Thought" by Tony Lane
https://www.amazon.com/Concise-History-Christian-Thought/dp/0801031591/ref=sr_1_fkmr2_1?keywords=Christian+Thinkers+Tony+Lane&qid=1579476358&sr=8-1-fkmr2

https://billygraham.org/about/biographies/billy-graham/

https://en.wikipedia.org/wiki/John_Gresham_Machen