The Ambassadors of Death - Episode 5

Full episode in color. Look, there's Sergeant Benton! Our first visit from Benton since his initial appearance in the Patrick Troughton tale "The Invasion". Good to see him again. There's also this silly theory being spread around in Who fandom that Sergeant Benton purposely killed poor Doctor Lennox. I personally think that's a load of hooey. Benton wouldn't do that. Someone infiltrated UNIT and planted that isotope. Besides, look how easy it was for Reegan to get inside the space centre and mess around with the M3 Variant fuel mixture. I think "Variant" is the correct spelling, not "Varient" as one of the signs on the pipes read. How the heck did Reegan know just which wheels to turn and which valves to open? It doesn't really matter, as the Doctor survives the launch anyway.