Back in 1912, a presidential candidate was shot on the campaign trail and went on to give his planned speech with a bullet lodged in his chest. Those are two of the stories that emerge in CNN’s historical docuseries “Race for the White House,” which is back for a second season. Here’s what to expect: When can I watch it?The final two episodes of season two will air on CNN Sunday, September 13 and Sunday, September 20 at 10 p.m. ET. Subscribers can also stream live via CNNgo and CNN mobile apps. Read MoreWho’s in it? “Race for the White House” uses a mix of rare archival footage, expert interviews and stylized dramatizations to tell the stories behind six of American history’s high-stakes presidential races. Expect to see some familiar faces from CNN as well as key figures from past presidential administrations, from Valerie Jarrett and Pat Buchanan to Luci Baines Johnson, the daughter of President Lyndon B. Johnson. Which elections? Season two of “Race for the White House” features the following races: Barack Obama vs. John McCain (2008)Ronald Reagan vs. Jimmy Carter (1980) Lyndon B. Johnson vs. Barry Goldwater (1964) Woodrow Wilson vs. Theodore Roosevelt vs. William Howard Taft (1912)Jimmy Carter vs. Gerald Ford (1976) Dwight D. Eisenhower vs. Adlai Stevenson (1952) Why does that voice in the series sound so familiar? Because it’s the soothing tone of Oscar-winning actor Mahershala Ali, who narrates the second season. Where can I watch more episodes? You can catch up on season one of “Race for the White House” now on CNNgo. New episodes from the second season will be available on demand the day following a premiere.