Haven’t we met before?
Pointing a few hands’ worth of fingers at various impostors (both organic and cybernetic), the Doctor and Romana get waylaid by a problematic regency dispute while making off with the fourth piece of the Key to Time. The end result is a lot swashbuckling, some painfully slow exits being burned through various walls (come on, pick it UP, K-9), more than a few broken dollies, and a fantastic overall performance by Mary Tamm.
As mentioned briefly last week, the BBC heard our pleas (not really) and released a bevy of Series 12 writer and director information! Better late than never?