Release Message:  Is time travel possible? Are people already hopping from era to era changing the course of things to come? Chris Hardwick hosts The Nerdist roundtable with Jonah Ray and Matt Mira to get to the bottom of the issue.

Description:  Is time travel possible? Are people already hopping from era to era changing the course of things to come? The Nerdist roundtable of Chris Hardwick, Jonah Ray and Matt Mira get to the bottom of the issue.