Lachlan is nervous as Belle persuades him to try one of the pills, and when it kicks in, he struggles with the effects. As she prepares to tell him her secret, he takes an alarming turn for the worse. A downhearted Finn perks up when Harriet reveals she has news about his mother, but will he choose to keep his family in the dark? Aaron tries to hide his pain as Robert insists their affair will end once he's married, while Paddy asks Pearl to pick him a winning horse ahead of the races.