Mortimer & Whitehouse: Gone Fishing (2018)

S1E37 Who's Walter?

Harriet runs into an older gentleman who used to work at the amusement park she and Ozzie visited during their dating days. She decides to invite him over for dinner, but the man mistakenly refers to Ozzie as Walter. Throughout the evening, he shares amusing tales about Harriet and this supposed Walter, leaving Harriet both amused and puzzled by the mix-up.