Survivor certainly lived up to its “Outwit, Outplay, Outlast” tagline this week, as the reality competition’s 50th season premiere torched its broadcast TV competition and gave CBS its best Wednesday night in years. According to a CBS press release, the Survivor 50 premiere on February 25 was the most-watched program that night in both total viewers — with an average of 5.06 million viewers — and viewers in the 25-to-54-year-old age group. The audience peaked at 6.18 million viewers in the first 30 minutes of the three-hour premiere and retained at least 90% of the audience for each successive half hour, the network adds. The Survivor 50 premiere also ranked as the most-watched Survivor episode since December…