At least there are some English actors, with real accents. Not surprisingly Richard Basehart's accent is hilarious - but better than Dick van Dyke's Cockney. While far from the best Columbo, this is a favourite as I was studying at Imperial College at the time and saw the crew preparing for the scenes. At one point there were a lot of jeering students (definitely 'Miners' - Imperial College graduates will understand) interrupted things. For this reason it brings back very happy memories of College days.
The "London Wax Museum" is not, as was stated in an earlier review, Imperial College. It's the entrance to the Royal College of Music, which is surrounded by Imperial College. The RCM would have got the cash, not IC. The Ipcress File scenes were further east, on the corner of Exhibition Road and Prince Consort Road. I spent two years living almost opposite the RCM, so knew the area very well.