Thursday, BBC1, 9pm The start of a six-part political conspiracy thriller revolving around Jason Isaacs, right, as the British ambassador in Washington. He becomes involved in a major diplomatic incident in a world of high stakes and manipulation. The cas

Thursday, BBC1, 9pm

The start of a six-part political conspiracy thriller revolving around Jason Isaacs, right, as the British ambassador in Washington.

He becomes involved in a major diplomatic incident in a world of high stakes and manipulation.

The cast includes Sharon Gless as the US Secretary of Defence and Eva Birthistle as a human rights lawyer