Mortimer & Whitehouse: Gone Fishing (2018)

S2E26 Ricky's Lost Letter

Ricky is eager to mail a letter to a charming girl who reached out to him, but disaster strikes when Ozzie unintentionally damages the envelope that held her address. Now, Ricky must find a way to retrieve the crucial information so he can send his heartfelt response and not miss out on this budding connection.