Doctor Who and the Underworld

At the very edge of the known universe, the TARDIS materialises on an aging spacecraft, the R1C. On board, the Fourth Doctor and Leela meet Jackson and his crew. They are doggedly pursuing their mission to recover the Minyan race bank from a ship which left their home planet centuries earlier.

Closing in on the P7E at last, Jackson risks everything to follow the trail into the heart of a newly formed planet. Can the Doctor help Jackson face his greatest challenge and secure the future of the Minyans?