My dad showed me a voicemail he had from Eddie Munson (from Stranger Things) that was addressed to Steve Harrington (also from Stranger Things). Eddie was voiced by Dulé Hill.
Martin Sheen, John Spencer, Allison Janney and Dulé Hill were filmed on a tarmac at Dulles Airport. However, the plane they emerge from wasn't Air Force One but Virgin Atlantic complete with a painting on its side that was digitally removed in the editing room and replaced by a presidential seal. So, if they couldn't get Air Force One, why drag the cast from California to Washington? 'The actors' teeth wouldn't chatter as convincingly,' Thomas Schlamme told Entertainment Weekly.
Excerpt from Inside Bartlet's White House: An Unofficial and Unauthorised Guide to The West Wing by Keith Topping
Shawn senses at once a dubious suicide may be covering up a serial killer, even before Gus is convinced by a series of parallel cases, albeit all with different MO and no common victims profile. Shawn pretends to be a medium inspired by the first victim's cat. He suspects the link is a suicide phone charity, but works out the truth just in time to prevent naive ever-helpful rookie Buzz McNab's wedding preparations turning into tragedy.
*This is the first episode where the "Gus nicknames" start the first nickname is "Gus Silly Pants Jackson."