Dastardly meaning

Narrator: While the town is sleeping, the mafia is out doing dastardly deeds.

His personal popularity, too, due partly to his youth and genial manners, was at this time greatly increased by the cool courage he had shown after the dastardly bomb attack made upon him and his young wife, during the wedding procession at Madrid, by the anarchist Matteo Morales.1 Whatever his qualities, the growing entanglement of parliamentary affairs was soon to put them to the test.

He ranged the whole field on horseback, making himself the most conspicuous target for Indian bullets, and, in spite of what he called the "dastardly behaviour" of the regular troops, saved the expedition from annihilation, and brought the remnant of his Virginians out of action in fair order.

Now he's disappeared and the entire world is threatened because someone wants to use the core for dastardly purposes and you must save the Doctor and the world.

dastardly plan of his own.