With its biggest programming announcement, the launch of a Keith Olbermann primetime show, made yesterday, Current TV held an anticlimactic upfront presentation today, at which it unveiled other new series and specials. Here is the cable network’s upcoming slate:

– One-hour special Man Vs. Earth to air in April: explorer Sam Branson investigates the cutting-edge tactics scientists are using not only to predict, but prevent natural disasters, from diverting hurricanes to quelling volcanoes.

– Five-episode original series 50 Greatest Documentaries to premiere in 3Q: Counts down the best documentaries over the last 30 years, paired with full-length presentations of many of the featured films.

– Five-episode original series Headlines That Shocked America to premiere in 3Q: Looks back at the biggest news events of the past twenty years.

– Six-episode original series Smoke Jumpers to premiere in 4Q: About Missoula’s elite team – the Special Forces of wildfire fighting — jumping fires by day and relaxing as bros when the flames die down.

The four join previously announced new series Bar Carma and 4th and Forever, the acquired This American Life and returning Vanguard.