Ramani's eyes followed the rise and fall of Jack's cricket ball in his hands as she made her impassioned argument. "I think she's the victim, guv. This Doctor's clearly got delusional and paranoid ideas about the way the world works, and he seems to have dragged her from pillar to post to help him solve these - imagined - problems of his."

"Well I trust your judgement, Ramani. What do you want to do with her? Or let's begin with him - Terry, what evidence do you have that he committed the arson at the Harrow Road warehouse?"

"Circumstantial," said Terry, leaning back against the windowsill, eyes also on the ball. "Laura and Reg arrested him at the scene. The fire was out, but he'd been mucking about with some electrical equipment that had obviously overheated and blown up, according to the SOCO."

"So his actions caused the explosion."

"Unknown. It's possible the explosion occurred prior to his interference."

"So who's responsible for this electrical equipment? Does it belong to the warehouse, is it electrical mains, what?"

"Unknown," said Terry. "Though the Doctor's accused Jo - our DC Masters that is - of installing it to further her ambitions for world domination."

Jack's eyes twinkled at Jo, who said, "He's off his rocker, guv."

Jack chuckled. "Has he made threats against you?"

"No," Jo replied. "Quite the opposite. He was the perfect gentleman when he realised he'd mistaken me for someone else."

"Have you had run ins with him in the past?"

"Never seen him before in me life."

"Okay. So what you're saying, Terry, is that this Doctor seemed to know what the equipment was for, and nobody else does, not even the SOCO. He's admitted to damaging the equipment, whatever it is. And it seems that he's arbitrarily put the blame on DC Masters or some other unknown person in order to justify his own actions. At minimum, it's trespass, and possibly criminal damage. Whether or not he's guilty of arson, to me that sounds like solid grounds to keep him in custody pending further enquiries."

"I just think he's a few planks short, guv," said Terry. "He might respond better if he didn't feel so threatened by us - we've probably triggered his paranoia by arresting him."

"He may not be the full quid," said Jack, "but I'm not satisfied that this man isn't a danger to himself and others."

Ramani nodded. "I agree, Terry. I mean, this man has this woman Jo Grant living in a wooden box. She has no contact with other friends or family. She has no sense of what year it is, what she's done with her life, and her only reality is the pursuit of this 'master' who she now believes is at the bottom of everything that's wrong with the world."

"So you want him banged up?" asked Jack.

"I at least want him kept away from her. I think if they're separated I might be able to get some answers out of her."

"And she had nothing to do with the arson?"

"I wouldn't have thought so. She obviously has poor technical knowledge, and frankly I think she's just along for the ride, to appease his ego and reinforce his psychosis."

"But what does she get out of that?"

"Well, I can't help wondering if he's got some kind of hold over her. If she's become delusional under stress to avoid dealing with the reality of a bad situation. She's coping, guv. She's stuck."

"Is there a sexual element to their relationship?"

"No. It's unlikely. She specifically referred to him as her friend, she denied a sexual involvement."

"Besides, guv, I'm guessing he's a bit ginger for that," put in Jo.

"He thinks our Jo's his boyfriend," added Terry.

"Ex," corrected Jo.

"And that makes him gay?" asked Jack, confused.

"Long story," said Terry. "Don't mind it."

"Okay," said Jack, putting down his cricket ball. "Let's get the psychiatrist down here for him and see what that turns up."

"Guv," said Terry.

"Ramani. Do you think you can get through to this Jo Grant if you spend some more time with her?"

"I think so. I've already made some progress - she's admitted her story doesn't make sense. I don't think there's permanent damage there. Perhaps to get well again she just needs a friend, someone to talk to."

"Like Margaret Barnes did?" muttered Terry.

"Oh, leave it out, Terry," said Ramani.

"Well you be careful, Ramani," said Jack. "You can't mend people, you of all of us should know that. But you can at least try and get the truth out of them. Let's give it twenty four hours, and if we've got nothing by this time tomorrow, we'll hand them over to social services."