Dick Van DykeEXCLUSIVE: The 88-year-old TV legend has signed for a guest stint on the series about a group of mail detectives in the Dead Letter Office who will deliver every last lost and dead letter to its rightful owner just when the recipient needs it most. Dick Van Dyke will play the team’s supervisor in Episodes 3 and 4 of Hallmark Channel‘s comedic drama Signed, Sealed, Delivered. The revolving role will feature a different TV icon every two episodes, with Valerie Harper playing the supervisor in the first two. It’s created and executive produced by Martha Williamson, in her first series since Touched By An Angel wrapped in 2003.

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