Kyle Chandler plays Hal Jordan, a former test pilot who is nearing his retirement from the Green Lantern Corps. He's training a new recruit, John Stewart Jr. (Aaron Pierre), to replace him. Nathan Fillion reprises his Superman role as the obnoxious Guy Gardner. The cast also includes Kelly MacDonald as Kerry, a small-town family-oriented sheriff; Jason Ritter as Billy Macon, Kerry's husband; Garret Dillahunt as William Macon, Kerry's cowboy father-in-law; Poorna Jagannathan as a woman named Zoe; Ulrich Thomsen as Sinestro, a former Corps member who's gone rogue; and Paul Ben-Victor as an extraterrestrial called Antaan.
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With this model we have to write out the return nil, err after each function call, but semantically we can think of control flow “jumping” to the point where we do something other than immediately return the error.
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