The Mermaid Theory

Summary

When Ted's new friendship with Zoey tests the theory that single men and married women can't be friends, he invites her husband, "The Captain," to hang out with them. Meanwhile, Marshall and Robin decide to spend alone time together, and Barney and Lily possibly have a fight.

Guest stars

• Jennifer Morrison as Zoey Pierson
• Kyle MacLachlan as George Van Smoot
• Tamara Lynn Davis as Iris
• Angus McClelland as Angus
• Lyndsy Fonseca as Daughter
• David Henrie as Son