Jo Grant

One of the Third Doctor's companions.  She was a UNIT agent fully trained in cryptology, explosives, and safebreaking, and owed her assignment to her uncle, a cabinet minister.  She helped the Doctor many times against the Master and twice against the Daleks.  She also fought the Nestene and their deadly Autons, the Mind of Evil, Axos and the evil designs of the Interplanetary Mining Corporation.   Her attempt to sacrific her life to save the Doctor's led to the Daemon Azal's defeat.  She then helped the Doctor fight the Sea Devils, the evil Marshal of Solos, Kronos and Omega.  She helped him escape from the Scope, and traveled with him to Peladon, where she  was not so insensitive to the charms of King Peladon.  But ultimately, she fell  in love with, and married, Professor Clifford Jones, who helped the Doctor defeat BOSS and the Green Death.  After her wedding, she sent the blue crystal from Metebelis 3 that the Doctor had given her back to him.  She also traveled with the Doctor to Karfel in an unrecorded adventure.