The Love Boat (1977)

S3E15 The Spider Serenade/Next Door Wife/The Harder They Fall

Gopher embarks on a romantic adventure with a passenger who has just separated from her husband. However, their budding relationship faces a challenge when her estranged spouse unexpectedly arrives, declaring his desire to win her back. Meanwhile, a woman attempts to disrupt her soon-to-be ex-husband's new romance by joining the cruise and staying in the cabin next door. Additionally, two esteemed passengers, who once clashed in a boxing match years ago, decide to reignite their rivalry and organize a fight on board to finally settle their differences.