Broadway vets and screen icons Valerie Harper and Dick Van Dyke have both signed on to guest star in Hallmark’s Signed, Sealed, Delivered. According to Deadline, Harper will appear in the first two episodes and Van Dyke in episodes three and four. The series follows a group of mail detectives in the Dead Letter Office, who deliver every dead and missing letter to its true owner just when the recipient needs …
SOURCE: Broadway.com at 01:25PM on February 12, 2014