Shades Of Gray

On Surata Four, Riker is stabbed by a vine thorn and infected with a microorganism that spreads toward his brain. Pulaski stimulates his brain, replaying memories as flashbacks, and finds that negative emotions inhibit the organisms. This eradicates the infection and Riker recovers.

Captain's log, Stardate 42976.1. During a geological survey on Surata Four, Commander Riker has become infected by an unidentified microbe.

Medical log, Stardate 42976.3. I can't keep the alien infection from spreading to Commander Riker's brain. Once there, it will kill him by dampening neural impulses. The only way I can keep him alive is to force the neurons to stay active by stimulating them directly with electrical impulses.

Medical log, supplemental. Commander Riker's condition is still critical. I've discovered a way to reverse the infection's growth rate, but I may be too late.

Characters with no lines who appear according to the cast list or the stage directions.

• Ian Andrew Troi II (cast list)

From Memory Alpha. Linked where the credit could be matched to a transcript label.

Starring

• Patrick Stewart as Capt. Jean-Luc Picard (Captain Jean-Luc Picard)
• Jonathan Frakes as Cmdr. William Riker (Commander William T. Riker)

Also starring

• LeVar Burton as Lt. Geordi La Forge (Lieutenant Commander Geordi La Forge)
• Marina Sirtis as Counselor Deanna Troi (Counselor Deanna Troi)
• Brent Spiner as Lt. Commander Data (Lieutenant Commander Data)

Special appearance by

• Diana Muldaur as Doctor Pulaski (Dr Katherine Pulaski)

Guest star

• Colm Meaney as Miles O'Brien (Chief Miles O'Brien)

Flashback appearances

• Vaughn Armstrong as Korris (" Heart of Glory ") (Captain Korris)
• Brenda Bakke as Rivan (" Justice ") (Rivan)
• Robert Bauer as Kunivas (" Heart of Glory ")
• James G. Becker as Youngblood (" Heart of Glory ")
• Steve Boyum as stunt double for Brian Thompson (" A Matter Of Honor ")
• Geoff Brewer as stunt double for Ward Costello (" Conspiracy ")
• Ron Brown as drummer (" 11001001 ")
• LeVar Burton as Geordi La Forge ( Skin Of Evil ) (Lieutenant Commander Geordi La Forge)
• Merritt Butrick as T'Jon (" Symbiosis ") (T'Jon)
• Steve Casavant, Steven Craig, Tricia Sheldon, Brian Sterling as Edo (" Justice ") (4 performers)
• Christopher Collins as Kargan (" A Matter Of Honor ") (Captain Kargan)
• Ward Costello as Gregory Quinn (" Conspiracy ") (Admiral Gregory Quinn)
• Denise Crosby as Natasha Yar ( TNG : " Justice ", " Heart of Glory ", " Skin Of Evil ") (Lieutenant Natasha 'Tasha' Yar)
• Jeffrey Deacon as command officer (" Heart of Glory ")
• Jake Dengel as Mordoc (" The Last Outpost ")
• Michael Dorn as Worf ( TNG : " Justice ", " Heart of Glory ", " Skin Of Evil ") (Lieutenant Worf)
• Abdul Salaam El Razzac as bass player (" 11001001 ")
• Dana Dru Evenson as stunt double for Denise Crosby (" Skin Of Evil ")
• Jonathan Frakes as William T. Riker ( The Last Outpost , TNG : " Heart of Glory ", " Symbiosis ", " Skin Of Evil ", " Conspiracy ", " The Child ", TNG : " A Matter Of Honor ", " The Dauphin ", " The Icarus Factor ", " Up The Long Ladder ") (Commander William T. Riker)
• Ron Gans as voice of Armus (" Skin Of Evil ") (Armus)
• John Garrett as Lieutenant (" Loud As A Whisper ")
• Whoopi Goldberg as Guinan (" The Dauphin ") (Guinan)
• Charles H. Hyman as Konmel (" Heart of Glory ")
• Rosalyn Landor as Brenna Odell (" Up The Long Ladder ") (Brenna Odell)
• Iva Lane as Zero Zero (" 11001001 ")
• Richard Lavin as Warrior #1 (" Loud As A Whisper ")
• Richard Lineback as Romas (" Symbiosis ")
• Jay Louden as Liator (" Justice ") (Liator)
• Mart McChesney as Armus (" Skin Of Evil ") (Armus)
• Matt McColm as stunt double for Jonathan Frakes (" A Matter Of Honor ")
• Tim McCormack as Bennett (" Skin Of Evil ")
• Carolyn McCormick as Minuet (" 11001001 ") (Minuet)
• Gates McFadden as Beverly Crusher ( TNG : " Symbiosis ", " Skin Of Evil ") (Dr Beverly Crusher)
• Kelli Ann McNally as One One (" 11001001 ")
• Karen Montgomery as Beata (" Angel One ") (Beata)
• Tom Morga as stunt double for Jonathan Frakes ( TNG : " Skin Of Evil ", " Conspiracy ")
• Gary Morgan as stunt double for Tracey Walter (" The Last Outpost ")
• Diana Muldaur as Katherine Pulaski (" The Child ") (Dr Katherine Pulaski)
• Randy Pflug as Ten Forward waiter (" The Dauphin ")
• Ray Reinhardt as Aaron (" Conspiracy ")
• Robert Schenkkan as Dexter Remmick (" Conspiracy ") (Dexter Remmick)
• Armin Shimerman as Letek (" The Last Outpost ")
• Marina Sirtis as Deanna Troi ( TNG : " Justice ", " The Child ", " The Icarus Factor ") (Counselor Deanna Troi)
• Brent Spiner as Data ( TNG : " Encounter at Farpoint ", " The Naked Now ", " Heart of Glory ", " Skin Of Evil ", " The Child ") (Lieutenant Commander Data)
• Patrick Stewart as Jean-Luc Picard ( TNG : " 11001001 ", " Heart of Glory ", " Symbiosis ", " Skin Of Evil ", " Conspiracy ") (Captain Jean-Luc Picard)
• Brian Thompson as Klag (" A Matter Of Honor ") (Lieutenant Klag)
• Tracey Walter as Kayron (" The Last Outpost ")
• Wil Wheaton as Wesley Crusher (" The Dauphin ") (Wesley Crusher)
• R.J. Williams as Ian Troi (" The Child ") (Ian Andrew Troi II)