Walker 1×17 “Dig” Season 1 Episode 17 Promo – “SUPERNATURAL’S” RICHARD SPEIGHT JR. DIRECTS – Walker (Jared Padalecki) and Micki (Lindsey Morgan) investigate a bomb threat at the school that targeted Liam (Keegan Allen) and Stan (guest star Jeffrey Nordling). Abeline (Molly Hagan) and Bonham (Mitch Pileggi) plan a vow renewal, and Trey’s (Jeff Pierre) mother (guest star Schelle Purcell) comes for a visit. Richard Speight, Jr. directed the episode written by Seamus Kevin Fahey & Anna Fricke (117). Original airdate 7/22/2021.