Jo Santini
Background
Jo Santini is a helicopter equipment engineer. Her uncle is Dominic Santini who also raised her. She grew up with Stringfellow Hawke and St. John Hawke.
During the events of Airwolf: Season 4 Episode 1 Blackjack played by Michele Scarabelli
Jo is flying in a helicopter with Hawke showing him a wind drift auto compensator she built. They test out her machine and it works. After they land, Jo runs back to the helicopter and finds an envelope. Dominic gets into his helicopter and as Hawke goes to speak with him the helicopter blows up. Jo visits Dominic's grave and then goes to the VA hospital where Hawke is being treated at. She tells Holt that she demands to see Hawke. Jason Locke walks up and starts asking her about Airwolf, but she again demands to see Hawke and enters Hawke's room. Jo continues to visit Hawke in the hospital and Hawke asks Jo to take Airwolf and find St. John.
Locke asks Jo questions about Dominic and what he was doing beyond Santini Air and then leaves an envelope with St. John's ring as he walks away. As Locke and Mike Rivers are driving to Airwolf's lair, they see it in the air. They follow it and find out Jo was the person flying it. She tells them she knows where St. John is and they take Airwolf to rescue him. St. John tries to warn Airwolf away and escapes from his cell. Burke gets into a helicopter and attacks Airwolf. Rivers then shoots Burke's helicopter out of the sky. Later, Locke, Jo and Rivers go back to the lair and Airwolf lands. St. John gets out and Locke recruits him to continue Hawke and Dominic's work.
During the events of Airwolf: Season 4 Episode 2 Escape played by Michele Scarabelli
In Istanbul, Turkey, Jo is waiting outside a building when she hears a gunshot and sees Massi running towards her with a gunshot wound to the chest. Jo hides and Massi continues to run and is chased by Gorski and Bulgarian Agent who continuously shoot at him. He stops by an empty pipe and hides the envelope in the pipe. Massi is shot and killed by Bulgarian Agent and Jo retrieves the package, before she is spotted by Gorski. She knocks him unconscious and shoots Bulgarian Agent before escaping. Jo takes a photo of a map and overlay that was in the envelope and then destroys them. She calls the lair and tells St. John she has the package and is on her way to Stockholm. On the flight, Svetlana Linski recognizes Jo, who almost knocked her down while Svetlana was talking to the reporters.
The pilot of the flight tells the passengers that they are being forced to land in Bulgaria. Svetlana panics and Jo grabs her and tells her to stay calm. In Sofia, Bulgaria, all the passengers are forced to deplane and go through customs. Air Guard asks for everyone's passport. Gorski starts looking at the passengers and has Svetlana taken away and then takes Jo away. He questions Jo about the theft of the maps, but she refuses to talk. Svetlana is brought into the room and he tells her and Jo that they will be tried as enemies of peace and global cooperation. Jo and Svetlana are brought to Stara Zagora Prison and as Barracks Guard walks by Svetlana, he drops a knife. She goes to pick it up, but is stopped by Jo. They are brought to the prison barracks and Cosima notices Jo is an American and Elena tells Jo she once worked at the United States Embassy. Jo is brought before the Commandant and is questioned about what information she might have passed, but she refuses to tell him. She is brought to the Commandant once more and then put in solitary confinement. She uses a piece of her shoe to short the light in the cell to send a Morse Code message.
Jo is brought before Arkov who slaps and searches her. Arkov tells Jo that he is working with St. John and tells her to be in the prison yard at 9 am. When Jo is brought back to the holding cells, she is attacked by Svetlana. The Commandant has Jo and Svetlana put into isolation. Svetlana tells Jo the reason she attacked her and how the guards spread a rumor she was KGB. Cosima frees Jo and tells her the guards promised her freedom if she betrayed Jo. Cosima is caught by the Barracks Guard and Jo tells him she is ready to talk. Airwolf arrives and starts shooting up the prison. As a guard is about to shoot Jo, Arkov shoots the guard. Cosima is shot by a guard who is then beaten to death by the other female prisoners. Jo, Svetlana and Taaja get into Airowlf, which then flies away. Back at Santini Air, Svetlana and Taaja thank the crew and Locke for saving them and Locke tells them their testimony will be given to Amnesty International to help shut down Stara Zagora Prison. Mike asks Svetlana to get him tickets to the next gymnastics competition and Svetlana hugs Jo.
During the events of Airwolf: Season 4 Episode 3 A Town for Hire played by Michele Scarabelli
St. John is flying a small plane as Jo flies a helicopter nearby as they test a new digital laser communication system. They start to race each other and Jo's helicopter is hit by a laser and crashes. Later, Dr. Kinsington takes Dr. Tracy Kinsington and St. John to Jo, who is injured, but kept hidden by Dr. Kinsington. As they are taking Jo to the car, Sheriff Lou and Hank Nelson pull up and take them hostage. They are driven to the Lundahl Industries building and Sheriff Lou takes them to Lundahl. Lundahl tells Sheriff Lou to kill them. Mike starts shooting at Lundahl and the guards and St. John manages to take away Hank's rifle and knocks Sheriff Lou into a fire and Sheriff Lou burns to death. Locke blows the buildings doors open and St. John and the others drive out in Sheriff Lou's vehicle. Hank starts shooing at Airwolf and Lundahl tries to use the laser cannon on Airwolf. Locke fires rockets into the building, but Airwolf is hit. He starts to lose power, but switches to manual override and fires a rocket at Hank and Lundahl, killing them. He lands Airwolf and flies away with the others. Back at the hospital, Dr. Kinsington tells St. John and Jo he is staying in town and Tracy tells them she is staying too.
During the events of Airwolf: Season 4 Episode 4 Salvage played by Michele Scarabelli
St. John and Mike are training in Airwolf when Locke radios them and tells them Lorrie Grant contacted him. They return to base and pack for a trip to Devil's Ridge and before leaving, Jo suggests they bring Lorrie back this time. Later, Locke and Jo get into Airwolf and take off for Devil's Ridge. Locke and Jo arrive in Airwolf at the Blue Clay Mine and get into a fight with Strafe and shoot the Scorpion out of the sky.