The Life and Love of Joe Coogan - S3-E17
Corrected entry: The clerical garb that Father Joe wears to his dinner date at the Petries' is more typical of Protestant clergymen than Catholic priests. A Catholic priest's shirt would not have a white circular collar. Rather it would have a black stand-up collar with a small strip of white cloth inserted in the front.
Correction: Actually, while it is more common for Catholic priests to wear a collar like that, it is not unknown for them to wear a full white collar around the neck.