Luke is left with little choice but to tell Bobbi Lee about his cancer diagnosis this week on Ros na Rún.
A distraught Colm is struggling to deal with what Mo has told him, but soon realises he needs to support her. What has Mo revealed to him?
Caitríona wants to make her documentary about Frances's murder. Vince wonders if it is too soon but Caitríona thinks it is the perfect time.
Michelle regrets sleeping with Fiach, and tells Sorcha, she only did it to make Rory jealous. Thanks to Sorcha, a disappointed Fiach realises that Michelle has no interest in him, so plays it cool when bumping into Michelle later.
Luke is left with little choice but to tell Bobbi Lee about his cancer diagnosis. He asks her not to tell Niall. Will Bobbi Lee keep his secret?
Colm wants to support Mo, but soon realises living in Ros na Rín may hinder his efforts. He comes to a drastic decision, but will Mo agree to it?
Michelle is far from happy about Emma’s new business venture and wants Caitríona to find info that could discredit her. Caitríona isn’t too pushed about doing it until Laoise makes a comment that triggers her curiosity. Will Caitríona discover Laoise and Emma’s past history?
Niall finds Briain’s behaviour at Coast guard training unacceptable and admonishes him for it, at the end of their meeting. Briain takes umbrage to this and, as retaliation, he reveals Luke’s cancer diagnosis.
Ros na Rún, TG4, Tuesday, Thursday, 8.30pm; omnibus edition Sunday, 7.30pm