DOCTOR: At least tell us who you are.

BIN LINER: We're the Kangs.

FIRE ESCAPE: Red Kangs. Red Kangs are best. (to Kangs) Who's best?

RED KANGS: (chanting) Red Kangs! Red Kangs! Red Kangs are best!

BIN LINER: (threatens the Doctor with a crossbow) So, who's best?

DOCTOR: The Red Kangs, I gather.

(shortly after)

BIN LINER: (to Mel) Are you a Blue Kang?

MEL: No! No, I'm not a Kang. I'm Mel. I don't know what the Kangs are.

FIRE ESCAPE: We're the Kangs! Red Kangs.

DOCTOR: (chuckling nervously) Who are, of course, the best.