Episode 5 (S04E05)

The department store's ground floor becomes a bustling movie set for the filming of Double Trouble, featuring the Dolly Sisters and the well-known actor Bumby Wallace. Harry revels in the renewed thrill he's brought to London, while Grove and Mardle struggle to come to terms with their history and what lies ahead. Kitty faces a shocking awakening, and Mae finds herself rekindling a romance with her former lover, Victor. In the midst of it all, Harry's past errors come back to haunt him in a spectacular way.