This one's a good entry in the alternate "Carry On" series, once again revolving around a medieval theme. Kenneth Connor is an unlikely, pint-sized King Arthur (he's possibly my favorite actor from the gang and perhaps the most underrated), Peter Butterworth is a bumbling Merlin, Joan Sims a flirtatious Guinevere, Jack Douglas (a late but welcome addition to the "Carry On" team) is the effeminate Sir Gay(!), Bernard Bresslaw the imposing knight who's supposed to defend the King's valor but prefers to spend time with the Queen!
A jousting tournament intending to showcase the cowardly Bresslaw's prowess sees Connor and Butterworth with the dubious help of Douglas cheat by devising a concoction capable of rendering the latter invisible to slay the proposed challengers; on the day of the event, however, the effect wears off and they have to resort to a different weapon! Incidentally, that same year, the Monty Python gang who started out in TV and then went into features made a big-screen (and obviously superior) lampoon of Arthurian times with the classic MONTY PYTHON AND THE HOLY GRAIL (1975).
A jousting tournament intending to showcase the cowardly Bresslaw's prowess sees Connor and Butterworth with the dubious help of Douglas cheat by devising a concoction capable of rendering the latter invisible to slay the proposed challengers; on the day of the event, however, the effect wears off and they have to resort to a different weapon! Incidentally, that same year, the Monty Python gang who started out in TV and then went into features made a big-screen (and obviously superior) lampoon of Arthurian times with the classic MONTY PYTHON AND THE HOLY GRAIL (1975).