Several Redditors agreed. In “The 43 Peculiarity,” Howard (Simon Helberg) and Raj (Kunal Nayyar) are obsessed with finding out what Sheldon (Jim Parsons) is doing every day for 20 minutes.
He locks himself in a Caltech basement room from 2:45-3:05 and refuses to tell them. It results in an elaborate prank, and Sheldon gets the last laugh.
Big Bang fan ivandemidov1 s3e12 voted, “The Psychic Vortex. Raj bribes Sheldon to act as his wingman resulting in both having dates.” They shared dialogue between Sheldon and Martha (Jen Drohan).
In “The Staircase Implementation,” Leonard (Johnny Galecki) tells Penny (Kaley Cuoco) how he became Sheldon's roommate. Also how he met Raj and Howard and what happened to the broken elevator.
Redditor perfectplacesanyway said, “It's the adorable episode where Penny and Sheldon do the ‘falling in love test' where they ask questions and then look into each other's eyes.
Another Big Bang Theory fan, Zebra-Connect, answered, “The one where they all played D&D and Howard was the Dungeon Master (DM).”
Redditor monomocessen quoted,
“You're playing D&D….”
“You're playing D&D….”
“This whole apartment is playing D&D!!!”