Half an Hour is a 1920 American silent drama film directed by Harley Knoles and written by Clara Beranger.

The film stars Dorothy Dalton, Charles Richman, Albert L. Barrett, Frank Losee, and H. Cooper Cliffe.

[1][2] As described in a film magazine,[3] Lady Lillian Garson (Dalton), whose marriage to man of wealth Richard Garson (Richman) has been in name only and the result of parental pressure, decides after an unpleasant meeting with her husband to take up the proposal of Hugh Paton (Barrett) and go with him to Egypt.

He is due to sail within half an hour of the time she made her decision, so she leaves a note for her husband, takes the jewels he has given her, and makes her way to Paton's quarters, which are "just across the square."

She is successful in this, though she meets Dr. Brodie at dinner with her husband, and the doctor does not disclose the facts of the case.