Every episode featured a special guest star, often Charo. Any time a black woman appeared on the ship, you knew she would become romantically involved with Isaac the bartender.

The theme was sung by crooner Jack Jones:

Love, exciting and new
Come aboard, we're expecting you.
Love, life's sweetest reward.
Let it flow, it floats back to you.
The Love Boat, soon will be making another run
The Love Boat, promises something for everyone
Set a course for adventure,
Your mind on a new romance.
Love won't hurt anymore
It's an open smile on a friendly shore.
Yes, love! It's love!
Welcome aboard, it's love!