After the delights of the relatively low-key cat and mouse (or should we say dog and mole) game last week, episode 5 of Slow Horses covers relatively similar ground, and not necessarily in the best way. As Lamb (Gary Oldman) and River (Jack Lowden) search for the evidence that will prove Taverner's (Kristin Scott-Thomas) involvement with the kidnapping debacle, the rest of the Slough House crew try to keep under the radar. But as the net tightens, it seems like time is running out and Hassan (Antonio Aakeel) remains in serious trouble as tensions within the Sons of Albion rise to breaking point. Slow Horses as part of a binge-watching session then it might not even register, but in isolation the last two episodes have done relatively well what one episode could have done really well. Much of this episode felt like treading similar ground to last week, even if the plot is moving forward with momentum and the final third is where the action really ramps up. Perhaps it's intentional and in keeping with the theme that has been evident right from the start: a lot of spy work is tremendously tedious. But, unfortunately, this episode didn't feel as exciting as last week, even if there was as much, if not more, stuff happening within it.