Lyle has a rather salacious personality, speaking constantly in innuendos and behaving inappropriately especially with someone he is interested in. He meets Karen when she tries to break into his hotel room, thinking it belongs to his daughter Lorraine.
When Lorraine needs a place to stay she moves in with them.  Later he proposes, with Lorraine's blessing and Karen accepts, tying the knot in the Season 6 finale. However, Karen decides that she doesn't want to compromise her identity to be with a man, and divorces him after twenty minutes of marriage. 
- John Cleese was nominated for a Primetime Emmy Award for Outstanding Guest Actor in a Comedy Series as Lyle, despite never being credited in any of his episodes.
- His brother said that he wore his mother's suit for the wedding.
You know, I get petrified about flying. I know it's childish of me, but I just have this vision of the plane going out of control and smashing into the side of the mountain. Ah, listen to me prattling away. I should just get into the cockpit and have us cleared for takeoff. Enjoy your flight, everyone. — before flying the plane in I Do. Oh, No, You Di-in't