One thing that struck me watching this episode was the stunning resemblance hero Gary Seven's 'Servo' device had to Doctor Who's inerrantly useful 'Sonic Screwdriver.'
From the size, shape - even down to the blue light they emit - they're practically identical. What's more, they both feature the same tendancy to deliver deus ex machina solutions to whatever problems their wielder is currently facing (from locked doors to disabling armed guards.)
Need to disable a nuclear missile? And distract your sentient cat with a laser pointer? Then Seven's 'Servo' is right for you!
One must clearly have inspired the other - and although Doctor Who is half a decade older than Gary Seven and his Servo, the light, noise and that 'door' thing make me think that it was the Servo that served as inspiration for the current Doctor's handy little toy, not the other way around.