If there’s one guaranteed highlight for any Pixar film it’s the appearance of fan favorite John Ratzenberger. For some movies Pixar has put good old John front and center, for others they’ve held his vocal talents until the last minute, keeping fans on the edge of their seat with worry that the end credits would roll without hearing his voice. For Cars, now only “5WKSLFT” as we’re reminded by the latest countdown poster, they’re advertising Ratzenberger’s appearance with the latest character wallpaper of Mack, a truck that appears perfect for Ratzenterger’s dulcet tones. The other character wallpaper this week is Sheriff, a police car voiced by newcomer Michael Wallis.

As with previous weeks, you can download the newest character wallpapers and the latest countdown poster in our Cars image gallery. You can also find all the past weeks wallpapers, posters, and images there as well.