“Poker Face” – The remaining seven contestants grow closer but keep their eyes on the prize as this week’s challenge is the most revealing yet. Attached to a lie detector test, contestants take turns sitting in the hot seat answering yes or no questions about their relatives. They must decide whether to tell the truth or lie, and while all attempt to give their best poker face, only one contestant wins immunity from the Guess Off. Back at the house, an alliance influences which clue is drawn and those facing elimination make their case to be The Guesser when “Claim to Fame” airs MONDAY, AUG. 15 (10:01-11:00 p.m. EDT), on ABC. (TV-14, L) Watch episodes on demand and on Hulu the day following their premieres.