Luther never did well with emotional bursts - he walked into things, got the job done and moved on. The seemingly cold Archer did better in this situation - they were entangled to some degree, he could see that - and through revelaing a fair amount of information, got Isobel to agree. Heaving a sigh of relief, Luther pulled out his car keys.
"My car's in the garage. Can you handle the stairs or do you need help...?" He paused, looking to Archer's thin frame and then back to Isobel. Carrying her would be difficult with his leg and Archer was in no position to. Why did she live on the ninth floor and why didn't the elevator work? "I hate this building," he muttered, half-to-himself.