TV What We Still Don't Know - Season 1 What We Still Don't Know - Season 1 /10 by 0 users Thought provoking Channel 4 series in which Sir Martin Rees investigates the great unanswered questions of science. Details Casts Posters Images Title What We Still Don't Know - Season 1 Alternative Titles First Air Date 2004-01-01 Last Air Date 2004-01-01 Number of Episodes 3 Number of Seasons 1 Genres Documentary, Networks Channel 4, Casts Martin Rees, David Malone Plot Keywords , Self - Host Martin Rees Self-host David Malone Episodes List What We Still Don't Know Season 1 :Episode 1 Are We Alone? Are We Alone? 2004-01-01 Thought provoking Channel 4 series in which Sir Martin Rees investigates the great unanswered questions of science. What We Still Don't Know Season 1 :Episode 2 Why Are We Here? Why Are We Here? 2004-01-01 Thought provoking Channel 4 series in which Sir Martin Rees investigates the great unanswered questions of science. What We Still Don't Know Season 1 :Episode 3 Are We Real? Are We Real? 2004-01-01 Thought provoking Channel 4 series in which Sir Martin Rees investigates the great unanswered questions of science.