DANGEROUS KNOWLEDGE is a flagging swansong for once-popular film star John Gregson, here aged to a degree he's absolutely unrecognisable; he would die before the show had a chance to be aired. This is a low budget Southern Television production in which some sub-spy antics play out as our unlikely middle-aged hero finds himself relentlessly pursued by persons unknown. With 6 half-hour episodes, this works out at 3 hours in total and it's three hours of total boredom rather than decent intrigue. The writing is sub-par; I can appreciate that this was going to be dialogue-heavy but not to this degree. Expect tacky May to December romances, Ralph Bates as an ineffectual villain, and old-timer Patrick Allen propping up the scenery. Laughing at the fashions is the most fun you'll have here.