Time will tell
Rose Beckett asked for a oneshot of Charming going to look for Emma in 3x21 and finding out she's gone through the time portal.
"She's not answering her phone." Charming said, worried. He looked out of the window towards the swirling pillar of green smoke. He couldn't leave her out there knowing that was there. He kissed both his wife and son's heads before ruffling his grandson's hair. "I'm going after her." He announced. "I don't like her being out there with that thing. And knowing Emma, she'll want to go investigate." Snow nodded understandingly. She was worried too.
Charming walked briskly to the source of the magic. But shortly before he reached it, it vanished. Rather than calm him it worried him more. Charming quickened his pace until he reached the barn. "Emma?" He called out. "Hook?" He was about to leave when something caught his eye. Emma's phone. His heart sank. He immediately knew what had happened. Zelena had somehow created her time portal and both Emma and Hook had been pulled in. "No." He gasped. "No! Not again!" How could he have lost her again? Again he'd been too late to follow and protect her. Again he had to rely on someone else. What if she got hurt? What if she couldn't come back? Neither he nor Snow would cope if they lost her. But he had no control now. Only time would tell.