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Sam Waldron — Sam Waldron is the owner of a van-based convenience retailer, known as "Sam's Mobile Shop". He is a good old friend of Pat who they once mutually assisted by delivering together. Pat often picks up the odd pack of biscuits or cough medicine from the shop now and again. Sam also has a toothbrush moustache which is usually infamous due to it's association with Adolf Hitler. (The character has not been featured on the show since 1996. It may be that Michael has replaced him.)
Amy Wrigglesworth — Amy is a fully trained vet who has come to work from Skegness.
Pumpkin Wrigglesworth — Pumpkin is Amy's Welsh mountain pony and can be very stubborn and grumpy.
Read more about this topic: List Of Recurring Characters In Postman Pat