"Split!" was the first classic Tara King episode, but not surprisingly, was a leftover Emma Peel script. Maurice Good ("Hunt the Man Down" and "Don't Look Behind You") opens as Harry Mercer, dependable, hard working Ministry agent, welcoming the arrival of fellow agent Frank Compton (Iain Anders), who talks of the mundane grind that they go through day after day. A mysterious phone call asking for 'Boris' suddenly transforms the genial Mercer into a far different, more cunning assassin, gunning down his friend using Compton's own gun, then instantly reverting to his old self, with no recollection of what has happened. The most vital clue is a sample of Mercer's handwriting, which changes just as suddenly from honest to devious, yet was composed by the same hand! Tara gets little to do until the climax, mostly waiting in Steed's apartment, and uses her ingenuity to cover for her lack of fighting experience (her relationship with Steed is still developing). The marvelous Christopher Benjamin ("How to Succeed....at Murder" and "Never, Never Say Die") makes his final appearance as Swindon, the handwriting expert, with fine veteran support from Nigel Davenport ("The Danger Makers"), Julian Glover ("Two's a Crowd," "The Living Dead," "Pandora"), Bernard Archard ("The Master Minds"), John G. Heller ("Man-Eater of Surrey Green" and "The Correct Way to Kill"), and John Kidd ("A Surfeit of H2O"). Steven Scott ("Dragonsfield" and "Second Sight") appears as Boris Kartovski, enemy agent believed killed by Steed in October 1963, but the character's name was the same as that played by Steve Plytas in "A Touch of Brimstone" (a minor scriptwriting error). Director Roy Ward Baker bows out of the series in high style, reuniting with Julian Glover and Maurice Good, from his just completed Hammer production "Quatermass and the Pit."