As for the more theater-based (as opposed to television-based) aspects of the series, they tend to be Time For Murder's major letdown.  The performances in the series, particularly those of the mentally unstable and the murderers are incredibly over the top.  There is no subtly to the acting whatsoever, the performances are all broad enough that the person in the back row of the mezzanine will be able to clearly delineate sane from insane.  It's something that's not necessary when the camera is placed 6, and not 60, feet from the actor. 

Additionally, the same set is used for the series over and over and over again.  In each episode there is a main room with a staircase that winds around it's back.  The hallways that extend from the room differ slightly (sometimes, anyway), and the paint, wallpaper, and furnishings change, but it is always the same room and quite clearly so.  By the end of the second or third episode one can't help but wonder if all the authors, when being commissioned to write their story, were told that said room had to be one of the main sets used.   

The last play-like element to the series is the audio.  One gets the feeling all too often when the characters speak that they are in a terribly large room, like a theater, as opposed to whatever moderately sized den or living room or entryway they are supposed to be in. 

While all of these elements conspire to diminish one's affection for the series, mystery fans (and fans of British TV) will find that they have done well to watch the series.  There are, as with all anthology series, greater and lesser episodes present in Time For Murder, but the good outweigh the bad, even if the evil outweighs the good within most of the tales. 

Time For Murder also has the good sense to begin and end with two best episodes of the six, "Bright Smiler" and "Dust to Dust," which certainly helps one feel as though their time has been well spent.  The only extra included are some cast filmographies, but those are usually just for killing time anyway.