Jack must decide whether or not to trust Locke after he is asked to follow through on a difficult task. Guest starring are Alan Dale as Charles Widmore, Kevin Tighe as Anthony Cooper, Sam Anderson as Bernard, Katey Sagal as Helen, Fred Koehler as Seamus, Maile Holck as nurse, Casey Adams as Wheeler, Ken Elliott as orderly, Christopher McGahan as Paul and Alan Seabock as sub captain. Written by Elizabeth Sarnoff & Jim Galasso and directed by Jack Bender.I’m especially keen to see next week’s, which is said to explain a lot, including what a Frozen Donkey Wheel Time Machine is doing far below the island’s surface. After tonight, four hours left: 6.15 Across The Sea 6.16 What They Died For 6.17 The End 6.18 The End 9 p.m. Tuesday. ABC.