Warehouse 13/Tear Jerker

• Tear Jerker: "Regrets", on a massive scale.

Sam: You were late.
Myka: No. You were early.

• The last ten minutes of "Where and When". Rebecca wants to share one last kiss with Jack by using H.G. Wells' time machine. When told that the Mental Time Travel is one way and will last nineteen seconds before her time-travelling self turns back into her past self, she replies "Why would I want to come back?"
• The ending of "Resonance". When it turns out that the bank robberies were not for the money, but were instead so that an old man could get reunited with his daughter and brought back to sanity again, and when a slow, sad piano song is being played in the background, Pete and Myka can't find it within themselves to report the bank robbers to the FBI, only taking the artifact of the week and leaving.
• The third season finale, where Claudia sees Jinx's dead body.
• In season 2 second last episode, The whole scene when H.G Wells falls victim to the Medusa head, which lets her live out her happiest desire. She is back in Victorian times playing with her daughter. "I'll never leave you again" When she is pulled away, her face is absolutely broken and she then asks Myka "Why did you do that?!"