It looks like you’re searching for free access to The Big Bang Theory seasons 1–10.
Key Episodes: "The Conjugal Conjecture" (S10E1), "The Birthday Synchronicity" (S10E12) Bernadette gives birth to Halley. Sheldon and Amy move in together. This season sets up the final two seasons perfectly, showing how far every character has come since the pilot. the+big+bang+theory+season+1+2+3+4+5+6+7+8+9+10+free
Max (formerly HBO Max): This is the primary streaming home for the series. You can find every episode from Season 1 through Season 12 here in high definition. It looks like you’re searching for free access
That being said, here are some legitimate options to consider: Library & physical media