In the Peaky Blinders season 3 finale, Tommy confronts Alfie for betraying him and indirectly causing his son’s kidnapping. Alfie gets angry at Tommy for saying he crossed the line, retorting:

I don’t give a fuck right now kid. Alright. I do not want him to spare me because of some fucking peace pact. I want him to acknowledge, that his anger is un-fucking-justified. I want him to acknowledge, that he who fights by the sword, he fucking dies by it Tommy. So what, they took your boy did they? Yeah? They got your boy? And what fucking line am I supposed to have crossed? How many fathers, right, how many sons, yeah, have you cut, killed, murdered, fucking butchered, innocent and guilty and sent them straight to fucking hell ain’ ya? Just like me! You fucking stand there. You judging me, stand there, and talk to me about crossing some fucking line? If you pull that trigger, right, you pull that trigger for a fucking honourable reason. Like an honourable man. Not like some fucking civilian, that does not understand the wicked way of our world mate.

Alfie Solomons – Peaky Blinders