Marcelo appears in the 7-part documentary series exploring how people search for meaning and connection. Oprah Winfrey Network, Marcelo's episode: October 21, 8 p.m.

Marcelo joins Morgan Freeman on the Science Channel to discuss the limits of humanity's potential. Through the Wormhole, season 5, episode 9, July, 2014

Marcelo Gleiser joins Morgan Freeman on the Science ChannelThrough the Wormhole, season 5, episode 3, March 5, 2014.