A Doctor Who drinking game

Take a sip when

• A Dalek says "exterminate"
• The TARDIS makes that sound
• The Doctor uses the Sonic Screwdriver
• The companion says something like "what's that, Doctor?"
• The companion gets captured
• The Doctor uses that incarnation's catchphrase
• William Hartnell flubs his lines
• Patrick Troughton says "when I say run" or "Oh my giddy aunt"
• Jon Pertwee reverses the polarity
• Tom Baker offers someone a jelly baby
• Peter Davison says "brave heart" or plays with his celery
• Christopher Eccleston says "Fantastic!"
• David Tennant says "Allons-y!"
• Matt Smith says "Geronimo" or "bowties are cool"

Take a drink when

• The Doctor kisses someone
• River Song says "spoilers" (unless it's "Silence in the Library"/"Forest of the Dead" in which case just a sip)
• Captain Jack makes an innuendo
• The Doctor pretends to be dumb/evil
• Two incarnations of the Doctor snark at each other
• Somebody who was in a James Bond film shows up
• Somebody who was in Game of Thrones shows up 
• Somebody other than David Tennant who was in the Harry Potter films shows up
• Colin Baker shows up in Arc of Infinity
• Peter Capaldi shows up in "The Fires of Pompeii"
• The villain is revealed to be the Master/Davros in disguise
• Take an extra drink if they used a pseudonym in the credits to disguise the actor as well
• A companion gets mind-controlled
• Master/Doctor is implied
• Doctor/Romana is implied
• A fez appears
• The guy you thought was the episode's main villain turns out to just be a front for the Daleks/Cybermen

Finish your drink when

• The Doctor does something a different incarnation refused/will refuse to do
• The Doctor uses another incarnation's catchphrase
• The Sonic Screwdriver is used to screw or unscrew a screw
• The Doctor comments disapprovingly on the "redecorated" TARDIS
• The Doctor regenerates
• A companion leaves
• The Doctor gets mind-controlled
• The Doctor reverses the polarity of the neutron flow
• You reach the point in Series 2 where, in your own personal opinion, "Doomsday" can't arrive soon enough