29. The Cousins
Receiving one of Breaking Bad's most memorable character introductions, Leonel and Marco Salamanca (also known as The Cousins or The Twins) originally turned up in Albuquerque looking for revenge for the death of cousin, Tuco.
The definition of silent but deadly, the violent pair wrecked havoc wherever they went, whether they were attacking a vulnerable Hank Schrader in Breaking Bad or manipulating Nacho Vargas in Better Call Saul.
They didn't get much characterisation and often felt like nothing more than deadly plot devices, but what they offered in entertainment value and unpredictability made them standout brutally, especially during their epic final moments.