In the last episode. The Dekarangers have just deleted Agent Abrella, the primary antagonist of this Sentai show. They contact Doggie Kruger to tell him that, but remember that Abrella told them he killed Doggie. The group remark that he's in heaven now. Then, Doggie asks them over their communcatior "Who's in Heaven?" They look behind them to see that he's alive and they all embrace him a hug. Doggie and Swan then say they are the best in the SPD. It's capped off with Doggie giving each one of the Dekarangers a hug, and they're all crying tears of joy (Even Hoji!)
Dekaranger vs Abaranger where Mikoto wishes the teams well and gives his regards to Asuka's daughter (Rije/Rijewel, now returned to a baby and re-named after Mikoto) before fading into thin air.
Episode 34. Sen-Chan hugs the alien boy he thought to be killed by the alienizers and was extremely happy to see that he's well. So touching.
Episode Thirty Eight: Cycling Bomb. Ban is riding a bicycle with a piglet-like aline named Yaako, who is turning away from her life of crime and tattling on her partner in exchange for leniency. Her partner, anticipating this, rigged the bike with a bomb that will blow up if it's speed drops below twenty-five kilometers an hour. Yaako repeatedly tells Ban to leave her behind and save himself, but instead promises he'll stick with her to the end, having her hold his SP License as proof. She's so touched by this that, just as they're going over a cliff, she reaches maturity and flies them both to safety.
Episode 46. Sen's concern for Umeko throughout the episode is heartwarming in itself, but of note is towards the end. Umeko has discovered that her fiance is a con-man who wanted to kill her and proceeds to delete him singlehandedly. Afterwards, she forces herself to be happy until Sen-chan tells her that she doesn't have to force it. Cue her running to him and crying in his arms, as he just holds her.
Episode 4 has Ban kicking Hoji in the face while Hoji's depressed after making a major mistake at a hostage exchange. It becomes heartwarming when you factor in that Ban actually did so to bring Hoji out of his depression and out of concern for his team-mate. It works.