The Lives of Captain Jack: Volume Two

 was a full cast audio anthology released in June 2019 by Big Finish Productions. It starred Jack Harkness, played by John Barrowman, with Colin Baker as the Sixth Doctor and Lachele Carl as Trinity Wells.

Publisher's summary
Captain Jack Harkness - time-travelling con-man, saviour of the Earth, and intergalactic adventurer. He has lived many lives. Here are three more of them.

2.1 Piece of Mind by James Goss

When the Sixth Doctor falls dying into his arms, Jack must carry on in his place. Is the universe ready for a whole new kind of Doctor?

2.2 What Have I Done? by Guy Adams

On the battlefields of World War I, something is hunting in the trenches. Jack must try and save the life of a wounded soldier.

2.3 Driving Miss Wells by James Goss

Alien invasions, stolen planets and burning skies - Newsreader Trinity Wells used to tell everyone the world was ending. One day she stopped believing it. Will her new chauffeur change her mind?