The full press release isn’t out yet, but here’s the TV synopsis:
President Taylor asks a private security firm to complete a sensitive task; Jack asks an old friend (Michael Madsen) for a favor before embarking on a mission of his own.
So now we know the episode where the Jim Ricker character (played by badass Michael Madsen) comes into play. And somewhat surprisingly, it sounds like he may be Jack’s ally rather than a villain.