"Who Was That Man I Saw You With?" was the last of 5 excellent episodes scripted by actor Jeremy Burnham, this time directed by Don Chaffey. Tara is assigned to break the defenses of an impregnable War Room newly designed by Steed, but so far has not been successful. Meanwhile, enemy agent Gregor Zaroff (Alan Browning, "Intercrime") has been sending her gifts and money as payment for special favors, leading Mother to believe that she has switched over to the other side. Steed remains dubious that Tara is now a traitor, especially when she escapes and demonstrates how circumstantial evidence might lead to a conviction. Also featuring Alan MacNaughton ("The Town of No Return"), Aimee Delamain ("November Five"), and Richard Owens ("The 50,000 Breakfast").