Down to Earth S04 E17 The Bag Lady

Jay Jay brings home what Ethel expects to be his girlfriend, but the whole family is in for a shock when he arrives with a bag lady. Instantly, the Preston's fall in love with Grace and ask her to stay -- but Ethel is suspicious because Grace asks too many questions about her. Turns out Grace is also an angel (with the CIA -- Central Intelligence of Angels) who's investigating Ethel.