Wendy's return puts Séamus on edge as she tries to commandeer his home for production, and his daughter Joanne's impressive audition for ‘I AM CELT' draws his family further into Wendy's orbit. Meanwhile, Wendy's choice for leading man goes AWOL, setting off a casting crisis, while Séamus realises he can't hide from Wendy forever.

Séamus' surgery is busier than ever after his shocking cosmic confession at the White Ridge, but the concerns his patients have are out of this world. Wendy navigates an awkward day on set as Big Jim struggles with unexpected script changes introduced by eccentric showrunner, Jack E. McCarthy. Tensions rise as Séamus' family demands answers, and Wendy drops a bombshell about Catherine.