The Doctor was trying to explain something to the two official-looking men in blue uniforms.  From behind the police box, Adric caught a few words: 'Now just a minute, Officer.  You don't realise what's going on here...'

The inspector's face was a grey wall of officialdom.  'No, sir, but I'll take the details when we get back to the station.  Lucky for you, it's not up to me to judge.'

'Lucky?  Oh, now surely you don't think...'  The Doctor tailed off.  He knew from past experience that jumping to conclusions was a favourite exercise on Earth.  And people in uniforms were much the same all over the universe.

The inspector glanced across at the constable.  'We're not paid to have opinions, sir.  Just to do our duty.'

'Well, I have opinions,' the Doctor retorted, gesturing towards the ghastly evidence in the back seat.  'This is the calling card of one of the most evil creatures in this universe, and I don't intend to stand here and debate the issue with you.'

This last remark was as much for Adric's benefit as anything else.  'I'm afraid, gentlemen,' the Doctor went on, 'that I'm going to have to get after him.'  So far the Doctor had been careful to avoid looking in the boy's direction.  But now he threw the briefest glance towards the TARDIS, and momentarily caught Adric's eye.  'So, if you can help me create a diversion...'

The inspector's eyebrows went up a notch further.  'Yes, I see, sir.  You'd better come straight along with us.'

'Of course, I'd love to.  But...'

With tact, but firmly, the constable took the Doctor's arm. 'To assist us with our enquiries.'

Adric pressed back against the TARDIS, thinking furiously.  Here was a chance to repay the Doctor for... well, for just being the Doctor.  He remembered their first meeting on Alzarius, when the Time Lord and Romana had taken him in and tended his wounds, and how subsequently the Doctor hadn't minded all that much to discover the boy stowing away on the TARDIS.

The two policemen began to steer their shambling suspect towards their car, and Adric had to back round acorner of the police box to stay out of sight.  He didn't know that the thing he had stumbled over was called a bicycle, but it was portable, bulky and would provide a step up to the top of the TARDIS.  It gave him an idea.

The two policemen had a firm grip on the Doctor by the time they got to the car.  When the constable stopped to open he door the Doctor allowed himself to be surprised by the sight of the police box, and said, as if the thought had just struck him, 'Would you mind awfully if I just phoned my solicitor?'

'That's not for this sort of thing, sir.  It's a police call box.'

'That's what I like about this country!'  The Doctor exclaimed, mustering up an authoritative enthusiasm that heightened the two officers' bafflement.  'A place for everything and everything in its place!'

Whatever the Doctor was planning to do next, he was obviously not about to get into the car willingly.  The inspector had a way of dealing with difficult cases.  'If you're asking for a formal arrest, sir...'  The inspector had already made up his mind that the tall tousle-headed man in the absurd red coat was dangerous, a lunatic perhaps.  The big toothy grin he got from the Doctor in response to the official warning was further confirmation of this suspicion.  In consequence the inspector was ready for anything - except the thing that actually happened.  No reasonable person could have anticipated that a bicycle would come arching through the air above them, to land with a clatter on the police car roof.  The Doctor was not a reasonable person in that sense, and in any case he had the advantage of glimpsing Adric the moment before, perched up on top of the police box with the bicycle held high over his head.

When the two startled officers turned to their vehicle, the Doctor detached himself quickly from their company and sprinted towards the police box.

'Quick!  Get him, Davis!'  The inspector's shouted command came too late.  By then Adric had jumped down from the roof, almost tumbling onto the Doctor, and the pair of them had bundled in through the blue double doors.