Wow Signal

Self

The Real 'X-Files'?

Himself

The Universe, UFO: The Real Deal

Himself

A Brief History of Time Travel

Self

When Aliens Attack

Self - SETI Institute

Ovni

Self

Alien Encounters

Self - Senior Astronomer, SETI Institute

Óvnis: Investigando o Desconhecido

Self – Sr. Astronomer, SETI Institute