The team tries to crack a mysterious case involving terrorist bombings that seem to be following a clear pattern, but not a clear purpose.
Shouldn't we at least ring the doorbell?
أليس علينا قرع الجرس على الأقلّ؟
Sollten wir nicht wenigstens
vorher klingeln?
On aurait pu au moins sonner,
avant d’entrer.
कम-से-कम दरवाज़े की घंटी तो बजानी चाहिए ना?
Non dovremmo almeno suonare?
Não deveríamos ao menos 
ter apertado a campainha?
Может, стоило хотя бы
на звонок нажать?