two-parter

noun
UK /ˈtuː pɑːtə/
US /ˈtuː pɑːrtər/

A story or show that comes in two parts.

The season finale was a two-parter, so we had to watch both episodes.


OTHER MEANINGS

2. A movie or TV event split into two separate broadcasts.

The network aired the two-parter over two nights.

3. A book or article published in two installments.

Her novel began as a two-parter in a magazine.

4. A task or event that happens in two stages.

The training was a two-parter: theory first, then practice.