Heartwarming / Without a Clue

• Every time Wiggins smiles after Watson compliments or tips him.
• Kincaid is furious when Lestrade insults the seemingly-dead Watson as being "no detective" and vows to solve the case in his memory.
• The smile on Kincaid's face when he learns Watson is alive.
• Kincaid is willing to retire at the end and keep his promise to Watson (who he credits with solving the counterfeiting case), only for Watson to publicly say this was a joke and reaffirm their partnership.