Mabel eventually returns to Mack of her own accord and is welcomed with open arms by the entire film company ("When Mabel Comes In The Room"). Mack is so glad to have her back that he agrees to film Mabel's new, serious drama, "Molly", at his studio. But he can't help himself - comedy is his nature. He attempts to jazz it up with a new comic creation, The Keystone Cops ("My Heart Leaps Up"), and Mabel returns to Taylor. Later, Mack sees Mabel again as she is preparing to embark on a ship with Taylor. Taylor shows up and Mack leaves. Taylor, sensing that Mabel might still have feelings for Mack, persuades Mabel, who is complaining of tiredness, to take heroin, saying it is a pick-me-up, which works with the magic words, "Bye, Mack!". Mabel is heartbroken by everything Mack has done to her, but is confident that she will eventually forget him ("Time Heals Everything").