When Bob and Frank get in touch with their friend Jack in New Mexico via radio telephony, a desperate cry for help sends the Radio Boys on an adventure on the Mexican Border. - Summary by Chris Thompson
Chapters
1 Forward 2 min 2 Chapter 1: A Cry in the Air 9 min 3 Chapter 2: The Enemy Near 9 min 4 Chapter 3: A Daring Leap 6 min 5 Chapter 4: Shots at the Station 6 min 6 Chapter 5: Plans for the Flight 7 min 7 Chapter 6: A Thief in the Night 8 min 8 Chapter 7: Kidnapped 7 min 9 Chapter 8: Held for Ransom 8 min 10 Chapter 9: On the Desert Trail 7 min 11 Chapter 10: A Brush With the Enemy 6 min 12 Chapter 11: Jack Cannot Sleep 8 min 13 Chapter 12: Jack Discovers a Traitor 9 min 14 Chapter 13: The Net is Drawn Tighter 9 min 15 Chapter 14: The Key to the Mystery 9 min 16 Chapter 15: To the Rescue 7 min 17 Chapter 16: A Sound in the Sky 9 min 18 Chapter 17: Inside the Cave 7 min 19 Chapter 18: The Fight in the Cave 8 min 20 Chapter 19: Resting Up 8 min 21 Chapter 20: Conferring by Radio 9 min 22 Chapter 21: Gaining an Ally 9 min 23 Chapter 22: Flying to the Rescue 7 min 24 Chapter 23: The Tables Turned 8 min 25 Chapter 24: Frank Saves the Day 8 min 26 Chapter 25: Danger at Hand 9 min 27 Chapter 26: The Night Attack 9 min 28 Chapter 27: Senorita Rafaela 10 min 29 Chapter 28: The Fair Traitress 8 min 30 Chapter 29: Three Cheers for the Radio Boys 9 min 31 Chapter 30: Good News for Anxious Ears 6 min 32 Chapter 31: Calm After the Storm 7 min 33 Chapter 32: More Adventure Ahead 8 min
