Doctor prepares desperate plan with Jo

The Doctor and Jo realize the Master has disabled sound reception in his TARDIS, forcing the Doctor to devise a non-verbal way to penetrate the silence. They must stop the Master before he completes his endgame with Kronos, but time is running out. While they discuss the danger, the Doctor improvises a solution, pulling a module from beneath the console to amplify their interference. Jo’s persistent questions reveal her growing fear while the Doctor’s focus remains razor-sharp, setting up their unstable but determined partnership against impossible odds. key_dialogue: [ DOCTOR: We've got to make him listen. It's our only chance of stopping him. JO: You're not thinking of going out there, are you? DOCTOR: No, not if I can help it. JO: Well, what are you going to do then? DOCTOR: If he's turned his sound receiver off, I must make myself heard without it. DOCTOR: If the thraskin puts his fingers in his ears, it is polite to shout. That's an old Venusian proverb. JO: What's a thraskin? DOCTOR: Thraskin? Oh, it's an archaic word, seldom used since the twenty fifth dynasty, the modern equivalent is plinge. JO: What does plinge mean? DOCTOR: Oh, for heaven's sake, Jo, I've just told you. It means thraskin ]