The Best Episodes Directed By James Tovell

Chris Packham tells the miraculous story of how plant life turned Earth from a barren rock into a vibrant green world - a four-billion year saga of extraordinary highs and lows that almost wiped out all life on the planet. Beginning as a water world without land masses, a giant asteroid bombardment triggered Earth's plate tectonics, leading to huge fungi, soil and giant swamp forests. But the early plants locked so much carbon dioxide that global temperatures suddenly plunged.

Raised in an environment of drug addiction and crime, teenager Justin Dickens commits murder but disputes the prosecutor's version of events.

Sentenced for a triple murder linked by police to Satanism, Miguel Angel Martinez becomes the youngest person ever on death row in Texas.