estaban desenterrando
Imperfecto progresivo para el sujetoellos/ellas/ustedesdel verbodesenterrar.

desenterrar

Otro iba a mostrarles encontrando a Locke y Boone en el lago (tienen palas, ya que estaban desenterrando la escotilla) antes de dar media vuelta y seguir con sus asuntos.
Another was to have them meeting Locke and Boone by the lake (they have shovels, as they were excavating the hatch) before they both carry on with their business.
Palabra del día
el guion