On an upcoming episode of Castle, the ABC hit will wink at Nathan Fillion's stint on One Life to Live and set an episode within the soap opera universe.

Appropriately, a handful of real-life daytime stars will make an appearance on the installment, which airs this spring. They include:

• Cameron Mathison (pictured, All My Children)
• Rebecca Budig (pictured, All My Children)
• Corbin Bernsen (The Young and the Restless)
• Jane Seymour

The episode will center on the fictional soap opera Temptations and a dangerous blogger who is unhappy with its storylines.