After following his planted tracking device's signal[a] to an empty stretch of highway, Mike Ehrmantraut finds it left in the middle of the road along with a ringing cell phone.
Two cars approach from opposite directions, Gus Fring exits one, and he and Mike discuss their concerns about Hector Salamanca.
Mike travels to Mexico and acquires cocaine from Barry Goodman, stows it in a sneaker and throws the pair over a power line over a road he knows Hector's trucks use.
The site's consensus reads, '"Sunk Costs" edges Better Call Saul toward a narrative crossroads, foreshadowing events familiar to Breaking Bad fans while serving up gripping drama in its own right'.
"[4] For his work on this episode, Thomas Golubić was nominated for Outstanding Music Supervision at the 69th Primetime Creative Arts Emmy Awards.