Q5 can mean many things, including:

• Q5 (now called Nightshade) is a Heavy Metal band
• Q5 was also the naame of the First series of the Q series, a British television series, originally aired in 1969. Known as a large influence on Monty Python's Flying Circus, it featured former Goon Show member Spike Milligan, and was directed by future Python director Ian MacNaughton . See Q (Spike Milligan series)