Target Practice (comic story)

Summary
A Soviet operative poses as a UNIT officer and attempts to persuade the Third Doctor to join them rather than work for UNIT.

Characters

 * Third Doctor
 * Jo Grant
 * The Brigadier
 * Sergeant Benton
 * Colonel Ashe

Continuity

 * Ashe claims that he and the Brigadier were at Sandhurst Military School together. Even though Ashe is a Soviet spy, and his story is fabricated, the Brigadier's attendance of Sandhurst is likely true.  Jo tacitly confirms it as fact by saying that the Brig rarely talked about his Sandhurst days.

Timeline
Broad dating of this story relative to television stories is made possible by the field of cut-out UNIT enemies seen on the target practice field. Especially helpful is the specific mention of Ogrons. When combined with the clear depiction of the early Third Doctor black-and-white costume, this story seems firmly set after Day of the Daleks, but some time within season 9.