I quite often record documentaries and films (in case I want to keep them if they are good enough). I usually record the two-hour episodes of things like Morse and Frost and Miss Marple so that I can watch them for a second time immediately afterwards so that I can understand more of the convoluted plot or spot some of the clues. My method of guarding against interruptions from phone calls is sometimes to put the subtitles on (page 888) and turn the sound down so that I can continue to half-watch and half-listen to the phone.