The Love Boat (1977)

S5E4 The Incredible Hunk/Isaac, the Marriage Counselor/Jewels & Jim

Julie hires Hank for entertainment, unaware that he also works as a stripper on the side. Meanwhile, Isaac attempts to help the downcast Frank connect with women, but things take a turn when Frank's ex-wife Jan shows up. On another front, Merrill spots Jim, a fellow passenger, and realizes he’s a known jewel thief. When a diamond goes missing, Merrill becomes increasingly suspicious of Jim’s involvement.