That Girl (1966)

Season 3: Episode 11

Donald's sexy new secretary, Pat Crawford, arranges to accompany him on an out of town assignment to Washington, D.C., hoping to steal his heart from Ann. Feeling neglected and rejected, Ann decides she'll spare Don the pain of breaking up with her and she'll have it all done by the time he returns, so she returns all borrowed items of hers and Donald's to their proper apartments. But when she discovers she was wrong, she has only minutes to get everything back to normal before Don finds out.