This is the first episode to reverse the "Mrs Peel, we're needed" teaser to be directed toward Steed instead.
The premise is the same as Agatha Christie's "Ten Little Indians".
Rocky Taylor and the stuntman called in to replace him both suffered cuts to the wrist during filming.
Plane at takeoff G-APWB is a 1961 Handley Page HPR-7 Herald 101 and crashed November 2, 1973. Cockpit view plane G-APMG is a 1960 De Havilland DH-106 Comet 4B. In air reversed image plane G-AVSO is a 1964 Handley Page HPR-7 Herald 214 and crashed April 8, 1997.