Princess Rukmini of Vidarbha wants to marry Krishna, but her brother Rukmi forces her engagement to Shishupala. Rukmini sends a Brahmin messenger to Krishna. On the wedding day, Krishna abducts her in a celestial chariot. He defeats Rukmi but spares his life on Rukmini's plea. Their marriage ceremony is elaborate and joyous.
Kansa invites Krishna and Balram to Mathura for a wrestling match. En route, they encounter the washerman (humbled), the elephant Kuvalayapida (killed), and the wrestlers Chanur and Mushtik (defeated). Krishna ascends the throne, kills Kansa, and frees Ugrasen. Episodes 70-80 cover the coronation of Ugrasen and Krishna's formal education under Sage Sandipani. Part 3: The Founding of Dwaraka & The Rukmini Vivah (Episodes 81–120) Jarasandha's 18 Attacks Kansa's father-in-law, King Jarasandha of Magadha, attacks Mathura 17 times. Krishna builds the impenetrable city of Dwaraka in the sea. The 18th attack forces Krishna to shift all residents to Dwaraka. Shri Krishna Serial By Ramanand Sagar All Episodes
This serial was iconic for its VFX (for the time), original songs by Ravindra Jain, and deep philosophical interludes. If you want episode-by-episode summaries (all 221), they are available in Hindi/English on fan wikis and streaming sites (Shemaroo, YouTube - Sagar Films channel). Princess Rukmini of Vidarbha wants to marry Krishna,
Krishna later marries Satyabhama, Jambavati (after retrieving the Syamantaka jewel), and 16,100 rescued princesses. His sister Subhadra is married to Arjuna (Mahabharata link). Part 4: The Narakasura & Baal Leela Continuation (Episodes 121–150) Narakasura's Defeat The demon king Narakasura had imprisoned 16,000 princesses. Krishna, with Satyabhama, kills him and rescues them all. He marries them to restore their honor. He defeats Rukmi but spares his life on Rukmini's plea