Night-Owl Mason. A few minutes prior to the exact time of the murder, Paul, who is on a case for Jimmy Meacham, coincidentally makes an unplanned phone call to Perry's office from Paris, asking Perry to relay his URGENT report to Jimmy (Paul can't reach the Meacham hacienda because a phone is off the hook).

• Outside the window behind Paul, the Paris street is bright and busy with pedestrians and auto traffic. The street activity suggests that the local time must be at least 9am, but to fit with the timing of events in LA revealed later, it must be earlier, say 7am Paris time (Paris sunrise was 6:13am if 12/13 May or 6:37am if 11 Aug).
• Outside Perry's office window it is dark.
• Paris clocks were (are) nine hours ahead of LA clocks, so it is no earlier than 10pm of the previous evening in LA and Perry is still at work (Stretching timings, it might be as late as LA midnight, 9am Paris).

Perry makes a crack about Paul being up early but it's not Paul that's keeping onerous hours; Perry is burning the midnight oil again!
In my opinion, the busy street scene behind Paul is a stock-footage "Continuity Glitch"; the scene should have portrayed less activity for early morning. Submitted by Gary Woloski, 14 Jan 2012.

JetSet Drake. During this episode Paul makes two round trips to Paris and return, on one of which (Paul tells Arnaux) he makes a side trip to Nice!! The apparent allowances for travel time are incredibly tight and Paul does other duties at destination and between trips such as sleuthing, tracking down Marie in Glendale and chauffeuring Perry, Jimmy and Marie in the big Lincoln convertible. He looks so fresh after warping through the time zones that he must have had the Star Trek Transporter! Yet Paul's effortless and almost-instant travelling works well as a plot device, even today when we are more familiar with global travel than people in the '60s. Part of the reason may be that the pace of the storytelling, implemented through the seamless editing, leaves the viewer with no time to even begin to question how Paul gets around so quickly. Also, 1964 audiences only had one chance to see the episode straight through with no replays. It's the Magic of Television! Submitted by Gary Woloski, 21 Jan 2012.