Slow Horses series 5 may be my favourite, so far.

Roddy Ho features prominently in the plot. Honey trap.
Nick Mohammed as Zafar Jaffrey, the Mayor of London is good.
James Callis as Claude Whelan (series 4–5), the bumbling, over-promoted new Director General of MI5 or ‘First Desk’ is fantastic.
Bad guys are Libyans.
I laugh out loud at every episode. Especially at Jackson Lamb (Gary Oldman) being so hilariously inappropriate. 😀
Looking forward to season 6.
Click PLAY or watch it on YouTube.