Again, tough to choose favorite episodes, but this one clearly deserves recognition among the best. All hell breaks loose when Archie discovers Mike's buddy David is a draft dodger, sneaking down for Christmas from Canada. One of my favorite moments is when Pinky Peterson (the Gold Star father) shakes hands with David and tells him his son would have wanted to sit down to dinner with him, and that's what he (Pinky) wants to do as well...you just see how tough it must be on him as a dad. Shortly thereafter, Archie still can't return to the table to face him, and Edith finally coaxes him by saying, "Please Archie...for me?" He looks at her, and slowly makes his way back to the table.
Also, love in the final scene when Archie reluctantly thanks the Christmas carollers outside his door, then mildly threatens to call the cops on them. He then shuts the front door, which is adorned with a wreath that reads PEACE.