It’s the 1970s, and the burger barons are turning to TV advertising to propel profits skyward. McDonald’s is betting that a little song and dance can give it the competitive edge, but Burger King is stepping up their ads as well: debuting a killer new slogan that’s sure to set it on a collision course with Burger Chef. And while the fast food wars continue to escalate at home, McDonald’s starts to set its sights abroad.