UNKNOWN Conflict View Graph ger_conflictarc_cd1d86b6d61a 1 event across 1 season Involved Characters The Fourth Doctor Jackson Arc Timeline Season 15 1 event S15E20 · Underworld Part 4 The Doctor forces Jackson to choose human life over artifacts Jackson’s crew attempts to board the R1C when the Doctor intervenes to evacuate the Trogs, who have gathered near the airlock. Jackson refuses to allow them on the ship, citing … Climax