Sophie Skelton and Richard Rankin discuss Brianna and Roger's'very final farewell' on "Outlander." 

Introductions and goodbyes dominated "Outlander" season seven's second episode.

During the revolutionary war, Jamie Fraser's (Sam Heughan) redcoat-wearing son. 

William Ransom (Charles Vandervaart) met his half-sister Brianna MacKenzie (Sophie Skelton).

After Malva's (Jessica Reynolds) murder, Allan Christie (Alexander Vlahos) confessed and was executed. 

In this episode, Brianna and Roger's second child, Amanda, was born. 

However, when Claire (Caitríona Balfe) discovers that her infant grandchild has a heart issue beyond her surgeon skills, the story takes an unexpected turn. 

She tells the pair their daughter needs modern medication or she'll die. 

By the end of the episode, Brianna and Roger make the heartbreaking decision to take their small. 

Family and travel through the stones to their own time, which Skelton and Rankin tell Insider is a final decision.

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