TheStreet: With the release of its second-quarter earnings, Starz is looking to push investor enthusiasm higher and build upon what has been a year of big gains for the premium TV network. Starz’s shares have surged 51 percent since the start of the year to $44.77. New, original series such as the time-travel fantasy “Outlander” and the business drama “Power,” which is executive produced by musician Curtis “50 Cent” Jackson, have helped elevate Starz’s profile among viewers and critics.