If you can accept The Animated Series as a continuation of TOS, then Kirk did not appear at all in The Slaver Weapon.

There are two episodes where the captain only makes a very brief appearance.

In Thine Own Self, Picard has a single line of dialog in the last scene.

In The Wire Sisko has only three lines.

If you can accept The Animated Series as a continuation of TOS, then Kirk did not appear at all in TAS: The Slaver Weapon.

There are two episodes where the captain only makes a very brief appearance:

• In TNG: Thine Own Self, Picard has a single line of dialog in the last scene.

• In DS9: The Wire Sisko has only three lines.