Summer Storm - S2-E3
Visible crew/equipment: A mic drops into view when Brandon asks Kelly who she is looking at while she is staring at Kyle.
Camping Trip - S2-E7
Visible crew/equipment: Dylan goes to the newlywed cabin and Brenda follows him. When she opens the door and says "can I join you" there a mic drop in the center of the top of the screen.
Visible crew/equipment: During the opening scene when the man is counting to 90 seconds there is a mic hanging in the top center the entire time.
Necessity Is a Mother - S2-E10
Visible crew/equipment: Near the beginning of the episode, Brenda is sitting next to a tree talking to the group after Dylan gets up to leave, and a visible mic comes into view hanging center top of the screen.
Leading From the Heart - S2-E11
Visible crew/equipment: When Kelly goes to the Walsh's house to speak with Bobby in the morning, a microphone becomes visible at the top of the screen while the two are sitting at the kitchen table. (00:42:00)
Leading From the Heart - S2-E11
Visible crew/equipment: At the end of the episode when Brenda is backing out of the driveway, Jim and Cindy are watching her but you can also see someone standing on the porch in the background.
Down and Out of District in Beverly Hills - S2-E12
Visible crew/equipment: Kelly, Steve, Andrea, Brandon, and Dylan are all gathered near the lockers when Kelly begins to discuss her opinion of Steve's new girlfriend Christine. Just after Steve says "Tell me everything that's wrong with Christine", the camera pans to Kelly where a microphone becomes visible at the top of the screen. (00:15:15)
Everybody's Talkin' `Bout It - S2-E21
Visible crew/equipment: While the parent meeting is taking place at the Walsh's home, Donna's mother stands up to express her opinions. The camera pans out to a wide shot where a microphone becomes visible at the top of the screen. (00:12:00)
Everybody's Talkin' `Bout It - S2-E21
Visible crew/equipment: When Kelly and her mother are having dinner with David and his father at the Japanese restaurant, a boom mic is visible above their heads. (00:18:00)